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RF Impedance Matching needed

The attached transmit circuit has very high S11 (and VSWR) at frequencies below 100 MHz.

Adjust the values of the L,C shown in the shematic so that it has low VSWR (less than 1.3) and low S11 for the frequencies 60,70,80 MHz.

The needed parameters are:

1. The output impedance at TX1_1 must be 50 ohms.

2. Transmit analogue input impedance 40 ohms

3. Transmit load impedance at the output pins 400 ohms.

Before bidding the Bidder should describe:

1. Which SW or Analytic Method should be used.

2. The reason of high S11 (and VSWR) at frequencies below 100 MHz .

Skills: Electronics, Circuit Design, Engineering, Radio Frequency Engineering, Wireless Radio Frequency Engineering

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About the Employer:
( 1 review ) ANKARA, Turkey

Project ID: #22762792

8 freelancers are bidding on average $216 for this job

du00000002

Hello, answering your 2 questions: 1. This mismatch has little to nothing to do with design software and/or analytic method used. 2. The reason for high S11/VSWR @ low frequencies? : impedance mismatch and general ign More

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4.9
marklai

Hello employer, as an experienced freelancer I placed a bid on your project because I have the expertise required to deliver superior quality. I am reliable, and I assure you constant updates in the project as a way of More

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schoudhary1553

Hello Sir, I am expert who understands the value of time. I pride myself in my attention to detail. I am very hard working and aim to deliver in less time than quoted. I want to make you, my employer happy without cha More

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4.1
Intel1994

Hello,sir.I have much experience in Electronics and PCB design. I have much experience in device manufacturing such as PIC, Arduino, STM-series(ARM), FPGA,CPLD,etc. I love Math & Physics. Using FPGA based on Verilog/VH More

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mohammedalqadasi

I am Communications Engineer and interested in scientific research, antenna design, Matlab programming and Electrical Engineering. I have already designed a microwave frequency radio frequency identification (RFID) rea More

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Ajurie

We have PNAX with frequency range from 250 MHz to 40.5 G. Also, we have NF analysis, spectrum analyzer, signal generator and all of other equipment that needed for this job

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Dhananjay2112

Hello, I am Dhananjay Yadav. I am a working professional in the field of Electronics Design and layout Engineer. I have more than 6 years of experience in the same. I have worked on wireless projects which involves 43 More

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vasur4a7

I had an experience of two years as a research fellow in the antenna, RF & Microwave circuit design field. But I am working on this topics from my [login to view URL] onwards. I hope I can deliver a quality work in on time. I will More

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