Ground planes are assumed to be perfectly conducting and of infinite extent. 3 Easy to analyze using transmission line or cavity models Most common type of patch or microstrip antenna Transmission line model The rectangular microstrip antenna is represented as. 9. The Number that follows "WR" is the width of the waveguide opening in mils, divided by 10. Where, P A = Power output of Port 2. RF Converters and Calculators. h is the height of the microstrip line above the ground plane. Engelmann from the Federal Telecommunications Laboratories of ITT, presented as a competing printed circuit line. The trace resistance of a microstrip is important in determining how much power it dissipates. For example, microstrip = microstripLine (Length=0. The microstrip coupling lines provide the input/output coupling and its strength are determined by the gap width and length (S 2, L 2 and S 3, L 8). The microstrip calculator determines the width and length of a microstrip line. Rectangle Loop Inductance Calculator. Microstrip Patch Antenna Calculator Calculate dimensions and edge impedance for desired resonant frequency. To use it, first select the tolerance of the resistor: 10%, 5% or equal or smaller than 2%. 1 shows a pair of coupled microstrip lines. Problem Definition 2. Use the add function to form the circuit and use the ports numbers as shown in the circuit above. Wcalc provides the ability to analyze the electrical parameters of a particular structure based on the physical dimensions and material parameters. Check the higher-up (calculators) page; Chemandy has two other microstrip formulas as well. Track Thickness: mm. The plots show the magnitude and phase of the input impedance. Stripline Layout Propagation Delay. Re: Microstrip feed line. Eq. This calculator helps you compute the characteristic impedance of a microstrip, a flat conductor suspended over a ground plane with a dielectric between them. beammy. In microstrip, the width of the conductor and thickness of the dielectric substrate impact impedance. So two estimates have been calculated for the frequency at which the first higher-order. P B = Power output of Port 3. Unit Converters. 2. By determining its trace resistance, the contribution of a microstrip to the overall circuit resistance can be evaluated. These include dielectric thickness (h), target impedance (Zo), and relative dielectric. 2. Ratings and Reviews 5. : Microsoft Windows. You can build an RC low-pass filter with a cutoff frequency of 1 kHz using a 3. 1. Microstrip Characteristic Impedance Calculator Using a Formula by Brian C. MTT-25, pp. The microstrip belongs to the group of parallel-plate transmission lines and consists of a single ground plane and anStripline Capacitance. 4. These dominant modes are for this case. The microstrip antenna produces maximum radiation in the broadside direction (θ = 0), with ideally no radiation along the substrate edges (θ = 90°). Share. 16 dB/cm. The limit as gap spacing goes to infinity is microstrip. Basic Calculator. Compute the height, width ratio, impedance and dielectric constant of a microstrip transmission line using Pasternack's online tool. Our RF and microwave calculators and converters will provide the figures you need for your radio frequency engineering needs. A microstrip line has a characteristic impedance (Z_{0}) of (50:Omega) derived from reflection coefficient measurements and an effective. Electronics and Electrical Engineering Tools. A microstrip transmission line consists of a narrow metallic trace separated from a metallic ground plane by a slab of dielectric material, as shown in Figure 7. 0300 meters. Equation 11. This web page allows you to calculate the width and length of a microstrip line for a given impedance, electrical length, or vice versa. Generate Kicad footprintGenerate SVG file. This makes Wheeler’s equations discontinuous and brings their accuracy into question when the microstrip width is similar to the height of the microstrip above the conducting plane. 24-25. where Z 0,surf can be computed as specified in Eq. Just to give designers a starting point, take a look at these differential impedance calculators you can use to get an initial estimate of the differential impedance for microstrips and striplines. The IPC-2141 trace Impedance calculator will help make initial design easier by allowing the user to input basic parameters and get a calculated impedance according to the IPC-2141 standard. Rogers Advanced Connectivity Solutions (ACS) has introduced an updated design program that is free to download called the MWI-2017 Microwave Impedance Calculator, a transmission line modeling tool for electronics engineers (setting up an account is required). Microstrip Line Calculator Welcome to this engineering tutorial where we will explore the concept of a microstrip line and its calculation. Such a microstrip is constructed with two traces referenced to the same reference plane with a dielectric material between them. microstrip returns a microstrip transmission line object whose properties are set to their default values. 6. Transmission-Line Calculator. 6. Transcalc. 08. Microstrip Line Calculator Analyze or synthesize a microstrip line based on substrate parameters and frequency. Microstrip has conductors embedded in two dielectric mediums and cannot support a pure TEM mode. Calculations provided on this page are a simplified subset from EMI Analyst models. As frequency increases, ac resistance. Microstrip lines have three parameters that we can change to achieve 50 ohm impedance: Due to design constraints, there is only one parameter (track width,) left to achieve 50 ohm. Several people have developed procedures that can be used to synthesize microstrip lines. This tool is designed to find the pcb impedance. Microstrip Impedance Calculator; Microstrip 90° Corner Calculator; Networks (mostly RF. While microstrips have desirable characteristics, when designing microwave or RF circuits, it is essential to note the different types of loss mechanisms in. 0 (modified)) A microstrip line is single-ended 1 in the sense that the conductor geometry is asymmetric and the one conductor – namely, the ground plane – also normally serves as ground for the source and load. Enter the relative permitivity, width of the trace, the ground plane spacing, and the substrate thickness to calculate the characteristic impedance. 3 kΩ × 47 nF) = 1. It include aggregate noise figure calculator, circular waveguide lowest cutoff frequency frequency calculator, dBm to dBW converter, dBm to Watt converter, Watt to dBm converter, microstrip line impedance calculator, PI attenuator resistance. P. Skin Depth Calculator returns skin-depth as a function of a material's resistivity and permeability, as well as the application frequency. TransLine. There are four different types of impedance used in characterizing differential trace impedances. The calculator below uses Wadell’s. II. Inductance of microstrip lines Microstrip lines used as shunt inductors Application Note AN258, Rev. 7E-6 [Ω · cm] L is the trace length [cm] T is the trace thickness [cm] W is the trace width. Basic Online Calculator. Following equation or formula is used for Microstrip Width Calculator. A = cosh − 1[ln(ZL / ZS) / Γm] = cosh − 1[ln(50 / 5) / 0. A calculator for solving the maximum current a microstrip can handle. Description. Microstrip Transmission Line Models The impedance Z 0 of a transmission line consisting of a circular signal conductor having a diameter d and centered between parallel ground planes separated by a distance h is given by:Microstrip Antenna Inset Feed Calculator. Half-wave and quarter-wave microstrip lines are used to design lumped elements. 25 ohms for the given dimensions, and IPC-2141, 83. 5 mils (241 microns). This. 1. Cite. Enter the values for trace thickness, substrate heights, trace width and substrate dielectric and get the output impedance in ohms. This article features a JS generator for hairpin microstrip band-pass filters in the GHz band. substrate permittivity :. With t = 35 um (typical for copper with plating on a pcb), Z odd drops to 44 ohms, according to LineCalc. The back side must stay copper coated and be connect to the ground. 2) (5. ; You can use the formula provided to calculate the capacitance of a microstrip when you have values for εr, A, and d. In stripline configurations, the conductor will be sandwiched between. For example on 0. For typical PCB parameters (ε r = 4, H 1 = 61. 03/10/2007: Online microstrip patch antenna calculator added in the TutorialsTools section. 1,283. tr = 0. Therefore doubling the thickness cuts the metal loss in half, but does nothing to loss tangent loss. The patch antenna, microstrip transmission line and ground plane are made of high conductivity metal. The ratio of cross-hatch conductor width (HW) to cross-hatch pitch (HP) plays an important role while characterizing the cross-hatch plane. The Differential microstrip impedance calculator is used to compute the differential (Zd) and single-ended impedance (Zo) of an edge-coupled microstrip line just by entering the width, separation and thickness of the trace along with the dielectric thickness and constant of the coupled line. Modeling approximation can be used to understand the impedance of. 2 Overview of Microstrip Antenna A microstrip antenna consists of conducting patch on a ground plane separated by dielectric substrate. The characteristic impedance is given by: Eq. 66, the trace height is 1. Several approximate formulae for its design are. For example, if you wish to input "25000000", just type "25M" instead. For example: Yellow Violet Red Gold: 4 7 x100 ±5% = 4700 Ohm, 5% tolerance. 09/08/2007: Online VSWR calculator added. The first Microstrip developments were done shortly after the appearance of Barrett’s article, in 1952 by D. An example of a wire microstrip might most often be found in prototypes or reworked boards where a wire is used over the top of pcb or copper clad material. An embedded microstrip can be constructed using a microstrip with a solder mask. When attempting to download & install from Norton 360 (antivirus software) removes the installation program. Calculate Microstrip impedance for given PCB parameters. This technique doesn’t work for wide band requirements, but is a simple way to achieve this at a specific. 3 shall be used. Then, multiply the values of L and l by 0. We recommend the software from Polar Instruments if you. Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. For example, coupledMicrostripLine (Length. This calculator determines the impedance of a symmetric differential stripline pair. accuracy microstrip calculator i'm sorry. 3mil seems like a substantial enough difference. h (substrate high) : unit. Wavelength Calculator. Lo: inductance per unit length. This works by taking advantage of coplanarity between the antenna and the feedline, which produces. In fact, striplines often make components such as band-pass filter's more accurately, with more symmetric roll-off and no lower cutoff frequency. 5 GHz. As seen here:PCB Trace Width Calculator This tool uses formulas from IPC-2221 to calculate the width of a copper printed circuit board conductor or "trace" required to carry a given current while keeping the resulting increase in trace temperature below a specified limit. Description. 5 was. The simplified test bench setup shown in the above figure is used to measure the cross talk between two microstrip lines on a grounded substrate. See Wheeler for equation. 0 out of 5. d is the separation (distance) between the microstrip and the ground plane, typically in meters (m). TX-LINE software is a FREE and interactive transmission-line utility for the analysis and synthesis of transmission-line structures that can be used directly in Cadence ® AWR ® Microwave Office ® software for matching-circuits, couplers, and other high-frequency designs. Understanding coax can be helpful when working with it. 98mil. All About Circuits is the largest online electrical engineering communities in the world with over 700K engineers, who collaborate every day to innovate, design, and create. Before, working with a trace impedance calculator, one should be aware of which equations the calculation. Microstrip is a type of electrical transmission line which can be fabricated with any technology where a conductor is separated from a ground plane by a dielectric layer. Dielectric Thickness: mm. The effective dielectric constant drives the length of the taper, this effect was not. FILTSoft is a user friendly filter design tool to aid, guide and expedite calculations from lumped elements level to microstrip structure. Decibel Calculator. The default units for all given values, except the subtrate dielectric, is in millimetres. Microstrip Patch Antenna Calculator Calculate dimensions and edge impedance for desired resonant frequency. Fig. The linked article below contains a free microstrip line calculator that can be used in your web browser. For Example WR-650 means a waveguide whose cross section width is 6500 mils. Go to. So two estimates have been calculated for the frequency at which the first higher-order. where Z 0,surf can be computed as specified in Eq. So, the dielectric at my 5-6GHz frequency range is 3. The following table compares bench mark values used by Polar Instruments with the results obtained. (© CC BY SA 3. This calculator is designed to calculate the characteristic impedance of an edge-coupled microstrip. An embedded microstrip is a microstrip transmission line or flat conductor separated from the ground place via a dielectric material. Frequency: Frequency at which the stripline is analyzed or. 1t for W/h ≤ 1 and Wr = W + 1. Don’t forget to check out our other calculators on our site and also our. 11) the required electrical length of the taper at 8 GHz is. 517 εr] The expression for εe is accurate to better than 1% for 8 < εr < 12 and 8 ≤ Z0 ≤ (63 −. Use port numbers 1 and 2 for the first microstrip line and connect another microstrip line from ports 2 to 3 which forms a series connection. The measured result of resonant frequency is very close to the simulated result. e. Transmission Line Reflection Calculator TRY TOOL . First the model of the microstrip patch antenna has to be drawn in HFSS. Consider the microstrip antenna shown in Figure 1, fed by a microstrip transmission line. 3: Normalized characteristic impedance and normalized effective permittivity of a microstrip line as a function of u = w / h. The PCB internal/external trace resistance shall be calculated according to the following formula: R = (ρ * L / (T * W)) * (1 + α * (TAMB – 25 °C)) Where: R is the trace resistance [Ω] ρ is the resistivity parameter, whose value for copper is 1. Going Forward with a Trace Impedance Calculator. Once you have the reflection coefficient, you can use it to calculate the S-parameters by comparing with your feedline impedance. If the parameters exceed the allowable ranges, the curve-fit models blow up. Wire Self Inductance. Tech. 6 GHz. Description. Provide values for H, T, W and the relative permittivity of the dielectric and click the button corresponding to unknown parameter Z o to calculate its value. Basic Calculator. For example, rfckt. 39 for the effective dielectric constant. Stripline. Choose from different models of microstrip, edge coupled, wire, embedded, or stripline, and adjust the input and output parameters. Use our microstrip patch antenna calculator; Patch antennas can also be circular or elliptical for a given operating frequency. But the choice of transmission-line technology, such as microstrip or grounded coplanar waveguide. High-frequency circuit designers must often consider the performance limits, physical dimensions, and even the power levels of a particular design when deciding upon an optimum printed-circuit-board (PCB) material for that design. example. In my fab, if I use 0. 6 Band Resistor. In fact, striplines often make components such as band-pass filter's more accurately, with more symmetric roll-off and no lower cutoff frequency. This tool calculates the matching network necessary to terminate a line of the specified characteristic impedence (Z o) in a specific complex load impedence (R L + jX L) at a specified frequency. 3 Answers. Version 6. V1 and V3 are the voltages at the input and coupled port, respectively. 06/11/2010: Apple Claims Iphone 4 Has Novel Antenna Design added. Tip: Use a planar multilayer substrate for the dielectric layer and ground plane. In some cases, users require a custom impedance value. Wire Microstrip Impedance Calculator; Edge-Coupled Microstrip Impedance Calculator; Striplines (relatively-high-frequency) A stripline is very similar to a microstrip, except that the trace is embedded in a dielectric layer (the board substrate), which is itself sandwiched between two ground planes. The Impedance Calculator evaluates single-ended and differential impedance for various impedance models. 0 Esta calculadora determina la anchura y la longitud física de una línea microstrip para una impedancia característica Zo y una longitud eléctrica dadas. The prototype built can be used UWB in communications or localization systems. HFSS Waveport Size Calculator Figure out the correct waveport size to use in HFSS for a microstrip line feed. Using this formula, you can calculate the characteristic impedance of a. This calculator finds both odd and even transmission line impedance. h is the height of the microstrip line above the ground plane. Because of the symmetry unbalance in Microstrip, all discontinuity elements possessWire inductance Calculator; Directional Couplers. hi balanis antena theory book thay have give example problem. 60. Any book for microstrip antennas should have the formulas you need to find the location of the feed point, to obtain precisely 50Ohm input impedance. The simple bandpass consists of an RC low-pass and a RC high-pass, each 1st order, so two resistors and two capacitors. Edge Coupled Stripline Differential Impedance Calculator. Relative Dielectric Constant ( εr ): Track Width (S): mm. Here's microstrip on 10 mil quartz. One half-wavelength resonator of the high-frequency (f 2) signal path also provides port coupling function for the low-frequency (f 1. This paper provides details on how to investigate a new method of teaching microstrip patch antenna design made by Metamaterials using MATLAB. 1977. 671; thus Z 0 = 48. The required inputs are the Dk value for the dielectric constant of the PCB substrate, and the. W (Line width) : unit. Latest News 04/20/2011: Noise Figure calculator added. • Coplanar wave guide. Quarter Wave Transformer Impedance Calculator. J. The primary difference between microstrip and stripline configurations is the placement of the signal conductor. The spacer material is. Schneider, "Microstrip lines for microwave integrated. by . So it should be possible for the velocity to change without the characteristic impedance changing, but. There is also a dielectric material placed above the conductor. Regardless of the attribution, there are a few parameters that are put into the calculator:rect_patch_tl. R = Zo (K + 1/K) Where, K2 = P3 / P2; (P3 - power at port 3) (P2 - power at port 2). There are 3 types of microstrip models to choose from- uncoated, coated, and embedded. The effective dielectric constant equation is from: M. Changed the microstrip impedance calculator formula to a complex version for accuracy. 2 of the Microstrip Calculator, h=H1 and b=H2-H1. 2. New UI and defect fixes. A usable directional. The edge couple differential symmetric stripline transmission line is a common technique for routing differential traces. Online Version. Calculate the width of a microstrip transmission line with this online tool. In microstrip, the trace will be present on the outer layer of your circuit board. Where L is the length of the dipoles. everything RF has created a series of RF calculators to help engineers and students with common calculations that they need to conduct frequently. Part 2 looked at two types of RF/microwave filters, but there are many more, including ceramic coaxial filters and helical filters. Fig 1: Equilateral triangular patch antenna with inset feeding Abstract: Triangular microstrip antenna is commonly used in wireless communication. 4. 5. Index Terms-Microstrip patch antenna, MATLAB calculator, CST, 2. dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Antenna G/T Noise temp. A microstrip is a flat conductor separated by an insulating dielectric from a large conducting ground plane and is mostly manufactured from a printed circuit board. 37 mil), the deviation of the calculated. RADAR RELATED LINKS. Microstrip Inductance Calculator Trace Width (W) in mm: Substrate Height (h) in mm: Calculate Inductance FAQs. IEEE defines it as "The loss between two isotropic radiators in free space, expressed as a power ratio. everything RF has created a series of RF calculators to help engineers and students with common calculations that they need to conduct frequently. This value was. Design Tools. docx 1 / 16 Microstrip Antennas- Rectangular Patch Chapter 14 in Antenna Theory, Analysis and Design (4th Edition) by Balanis Shown in Figures 14. Both formulas of the dielectric, as well as the total losses, agree. V V V . Select the box with the geometry that you would like to calculate. example. The shape factor is defined as the ratio of two separate attenuation levels used to calculate the cutoff frequency. λ is the wavelength of the signal in free space. Equation (14-20a) states. It is similar in function to capacitors and inductors but only for very high frequencies. Microstrip Differential Impedance Formula. Coplanar Waveguide With Ground Characteristic Impedance Calculator. This online skin depth calculator calculates the skin depth δ by entering the value of the. Atwater,“Simplified Design Equations for Microstrip Line Parameters”, Microwave Journal, pp. 0 6 / 15 2011-04-28 2. Multiply the result by the square root of the ratio of (1 + (2 * h / w)) to (1 – (2 * h / w)). Within each model, the following combinations are available:. h s is the height of the aggressor microstrip above the reference plane in meters. Calculates the resistance, inductance and capacitance per unit length of common low-loss transmission line configurations. This calculator is designed to calculate the inductance of a microstrip given its dimensions (width, length and the distance of the strip from the ground plane). most intuitively appealing models for a microstrip antenna. Wr is a correction factor defined as Wr = W + 1. Microstrip is a single trace on the top layer, with no ground close to it on the same layer. The substrate parameters (ε r and h) and the frequency of interest are required. This calculator provides accurate microstrip transmission line analysis and synthesis. It splits an input signal into two equal phase output signals, or combines two equal-phase signal into one in the opposite direction. *Solder resist PCB coating will have the effect of lowering the impedance (due to the 30um or so of Er 3. Introduction. Description. This is a natural way to implement a transmission line on a printed circuit board, and so accounts for an important and expansive range of applications. A DIY Dual Directional Coupler, 5 - 1500 MHz, 10 / 20 dB; A DIY Dual Directional Coupler, 5 - 2850 MHz, 17 ±1 dB; Understanding Directivity; How to Measure Directivity of Directional Couplers; Microstrip. This tool helps you create a matching circuit so that optimal power transfer occurs between unmatched loads. When two transmission lines are placed close to each other, the electromagnetic field interactions of each line cause power to be coupled between the two lines. Access Rogers' calculators, literature, technical papers and request samples on your smart phone or tablet through the ROG mobile app. deepcold said: thanks. ( 0. 1. Description. 2. R w = Terminating resistance between two. This calculator can calculate the impedance and propagation delay of any microstrip by taking its respective height, width, thickness & dielectric constant. Calculators and applications for online RF analysis and synthesis Ease your RF and microwave development with Marki Microwave Tools. 4, 4, 9. Rin (y=y_o)=Rin (y=0)*cos ( (pi/L)*y_o)^2. In addition, our bandpass calculator reduces the effort thereof. This can be set to zero, but the calculated loss will not include conductor losses. Each Port is matched to the characteristic impedance Z 0 of the single, isolated microstrip transmission line. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. 2 of the Microstrip Calculator, h=H1 and b=H2-H1. There is also a dielectric material placed above the conductor. One of the features of this type of microstrip is the coupling between lines. Copy the side edges and translate the edges a distance of 1/7 of the microstrip line width. Passive band pass filter 1st order. 9 GHz and the magnitudes of S 21 and S 31 are. used to determine the radius of circular microstrip antenna. - Tee Attenuator Calculator. The JLCPCB results are more reliable than (some of) the simple formula-based approaches. 04/02/2007: Ansoft Designer Planar EM Simulation of a microstrip transmission line added in the TutorialsTools section. Overview. Impedance in your traces becomes a critical parameter to consider during stackup. The length of a half-wavelength dipole can be calculated by the given formula: L =. A tool for accurate microstrip transmission line analysis and synthesis, with substrate parameters, physical and electrical parameters, and loss equations. 8), the ratio of W/H for fifty-ohm microstrip is about 95%. Activity points. Here's microstrip on 10 mil quartz. Differential Impedance of. The advantages of coplanar waveguide are that active devices can be mounted on top of the circuit, like on. 6 mm εr 4. This parameter is used for the loss calculations. In most practical cases, the dielectric substrate is electrically thin, that is, h ≪ λ. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. Modeling approximation can be used to understand the impedance of. The best ECAD software will include a field solver-based model. Height: Height of the substrate. Calculadora de Líneas Microstrip S. PI Network Impedance Matching. It can calculate low-pass, high-pass and bandpass lumped-element Chebyshev filters, of third, fourth and fifth order (N=3, N=4 and N=5). Dielectric Constant. The characteristic impedance (Z o) of a microstrip transmission line can be calculated using the active calculator or the equations at the bottom of the page. The edge couple differential symmetric stripline transmission line is a common technique for routing differential traces. The "optimum" mitered bend equations for microstrip were found empirically way back in the 1970s. On the SVG file, the horizontal line at the bottom of the page is 150 mm, to check scaling after. 7 characteristic impedance 50 Ω . A microstrip transmission line consists of a narrow metallic trace separated from a metallic ground plane by a slab of dielectric material, as shown in Figure. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. A microstrip patch antenna is one of the most popular microwave antennas. It also provides examples and references for further reading. The characteristic impedance (Z o) of a microstrip transmission line can be calculated using the active calculator or the equations at the bottom of the page. Amongst them are a Smith chart s-parameter plotter, a lumped element balun designer, a microstrip calculator, a mixer spurious product calculator, and thermal dissipation calculator. Enter the values of trace width (w), trace thickness. Note: Units do not matter for this calculation as long as they are consistent. 35/fmax. Grieg and H. V. The calculator calculates the effective dielectric constant, loss, and effective impedance of the microstrip line based on the nonhomogeneous nature of the structure and the frequency of interest. Learn how to design microstrip and CPW power dividers using Keysight EEsof EDA tools in this technical overview. PCB Trace Max Current Calculator (External) This tool, based on the formulas and graphs contained in the standard document [1], calculates the maximum allowable current that can flow through a copper printed circuit board external trace (also called as microstrip), keeping the temperature increase of the trace itself below the specified input. subtracted from each measurement. microstrip antenna is the best choice for modern wire-less and mobile applications4–6. Microstrip antennas are becoming very widespread within the mobile phone market. Calculates with the characteristic impedance of the system and ratio of the power at the output to get the impedance of the various transmission lines that make up the Wilkinson Power Divider. Some are based on look-up tables, some completely hide their algorithms. Free Space Path Loss Calculator. 04/03/2007: Microstrip Patch Antenna: From Simulation to Realization added in the TutorialsTools section. Microstrip Crosstalk Calculator. Version 6. Assumptions and Limitations. That still may not mean the formulae are valid for that range, just that the calculators have not implemented catches for this unexpected range of use. Width (w) Trace Thickness (t) Dielectric Thickness (h) Relative. 588 mm and relative permittivity of 2. Use our microstrip patch antenna calculator; Patch antennas can also be circular or elliptical for a given operating frequency. There is almost no limit to the filter designs which can be built using a PC board pattern cut with. Width. Created: 16 October 2022.