How to design a microstrip matching network for antenna?????

[fishyxl]

I am working on a collinear printed antenna. The input impedance is about 80+j10. I need to design a matching network to lower the VSWR. BUT how to design it. Can you give me some examples or references?

 

[Demonis]

And what is about the bandwidth you need.

 

[harrysmith]

Re: How to design a microstrip matching network for antenna?

What antenna? discrete or distributed matching network? bandwidht?

 

[kenneth]

Re: How to design a microstrip matching network for antenna?

I think you can check out the books:
Microwave engineering by Pozar and
Antenna theory 3rd edition by Balanis

Kenneth

 

[sophianining]

The bandwidth is about 20MHz. The operating frequency is about 2GHz. I need a matching network made on a substrate, not of lumped elements, but of maybe quarter-wave transformers and tuners.

 

[VSWR]

Re: How to design a microstrip matching network for antenna?

What kind of substrate? Epsilon-r? Dielectric thickness? Conductor thickness?

The bandwidth is about 20MHz. The operating frequency is about 2GHz. I need a matching network made on a substrate, not of lumped elements, but of maybe quarter-wave transformers and tuners.

 

[plasma]

Re: How to design a microstrip matching network for antenna?

Did you put it above GND plane? If so try to change the distance
or else change the width of input line.

pl

 

[fishyxl]

The dielectric constant is 2.65.

 

[Demonis]

Re: How to design a microstrip matching network for antenna?

What kind of feeding has the antenna? Can you post a photo? anyway it can be a quarter-wave transformer (bandwidth is small).

 

[fishyxl]

The feed is an SMA connector. It is a printed collinear antenna.

 

[Demonis]

Re: How to design a microstrip matching network for antenna?

Do you want a transformer on the same substrate or do you want to make it before the SMA connector? It is important to know (as plasma says) about the ground surface.

 

[fishyxl]

I want a transformer on the same substrate

 

[fishyxl]

In urgent need! Help!

 

[Demonis]

Re: How to design a microstrip matching network for antenna?

You can look the idea of matching devices (if there is a grond on a substrate) in these articles

Anywave a good matching device can be done only in RF Simulation programm (HFSS, CST Microwave Studio)