How to Design RF and Microwave Impedance Matching Networks

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@quyenangcao5744 8 жыл бұрын

hi, I want to match with a antenna. but impedance of an antenna varies depending on frequency. so I chose the option "S/Y/Z file" but it allow to insert s2p/y2p/z2p only while I need only one port to measure the antenna impedance, mean that I get only s1p file. so, how could I use that option. or could you tell me the another way to match an antenna in wide band ?

@971333 7 жыл бұрын

Hi friend For one port (s1p) calibration, you need to do Open, Short and Load for port1 calibration. For two port(s2p) one, you need do individual port1(O,S,L) & port2 (again, O,S,L) calibration before 2 ports inter-connection compensation(just connection port1 and port2 with a ''through'' commponent). F.Y.I

@357destroyer 7 жыл бұрын

Someone commented the same question below but I didnt understand the response very well. If the S parameters are given in a s1p file (as oppose to a s2p file), how can I use that as the input impedance when using the match synthesis? Thanks.

@atasarrafinazhad1104 7 жыл бұрын

When you design this matching circuit i see an inductor value of 4.8nH which is impossible to make in layout design since you have power combiner at the output of transistors. How can we design LC network with reasonable values ? Is it possible to put limit on capacitor and inductor values ? Thank you.

@rachitjoshi23 8 жыл бұрын

Hi, Could you please explain the step by step theoretical procedure while designing the 3 stage matching network as I always have difficulty in designing the interstate matching network. I have already gone through your webinar but you did not tell the theory being used for interstate matching network design. I mean can we design it manually using the information of the reflections coefficients by running the load pull simulations

@KeysightEEsofEDA 8 жыл бұрын

Hi Rachit, Here's how Match Synthesis works. This was taken from the Genesys help documentation, and for more details search "How MATCH works" in the product documentation. Consider the following amplifier matching problem: SOURCE [NETWORK] [DEVICE] [NETWORK] LOAD In the first pass, MATCH uses a synthesis algorithm for the input network to match the source to the device S-parameter data. This synthesis may be exact or approximate, depending on the nature of the source, the network and the device. Next MATCH computes the impedance looking into the output of the device and synthesizes an output network to match this impedance to the load. If the synthesis is an exact type, and the device is unilateral, an exact solution results at this point. However, the device typically is not unilateral, so the output network just inserted changes the required input matching network. Therefore, MATCH computes additional iterations for the number passes specified in the Defaults Menu. If the synthesis is exact, the solution is very good at this point. However, because the source and device impedance data is typically frequency dependent, the synthesis is approximate. Optimization is used for an improved broadband solution.

@KeysightEEsofEDA 8 жыл бұрын

If you still have more questions, you can submit this form to speak with an engineer, www.keysight.com/find/eesof-sales-assistance.

@ngnews24-tv13 8 жыл бұрын

Please how can I use a commercially available library like Avago and Murata in doing my matching. in Genesys. I really want to match with components I can easily get in the market

@KeysightEEsofEDA 8 жыл бұрын

+S.I. CIMTHOG To use commercially available passive components for matching,go to the Tune Window, select Standard Values to tune and check Match1_Analysis to auto recalculate. Tune the passive component values to the nearest commercially available standard values and make sure the match return loss is not degraded. For extra insight, you can substitute the tuned components with the actual S-parameters of the L or C from the Murata library in Genesys and analyze it with the linear simulator over your frequency band.

@KeysightEEsofEDA 8 жыл бұрын

+S.I. CIMTHOG To use commercially available active components, Genesys canautomatically synthesize the input and output matching networks to the component S- or X- parameters. Highlight the input matching section. Click Add Device and browse to the SYZ file to define the device. If you have your own design in the workspace, browse to that design. Highlight the added device. Click Add Section to add the output matching section to the device. Watch matching magic happens when you click Calculate and Optimize.