How to connect an antenna with the PA output?

[zhaofeng1983]

Do most trasceiver use PCB layout instead of a antenna product nowdays?
How to connect the antenna with the PA output? Does it work as the PA choke or connect with a matching network?

 

[khouly]

Antenna connection

most of the PA modules are internlly matched to 50 ohm , so all u need a 50 ohm PCB trace to the duplexer and from the duplexer to antenna connector

but if ur designing ur PA , then u need to design the matching network by urelf

khouly

 

[zhaofeng1983]

Antenna connection

Does general antenna has a connection to power supply vdd?

 

[khouly]

Antenna connection

no , in the antennas i work with no , i am using antennas for the cellular and PCS and WCDMA band , for Fixed wireless terminals

khouly

 

[noorm]

Antenna connection

Dear All
If any one has the the tutorial about conversion of s-y and z parameters.

Thanks

 

[zhaofeng1983]

Re: Antenna connection

Enclosed is a transformation table for S,Y,Z parameters.Hope it will be helpful.

 

[zhaofeng1983]

Antenna connection

khouly, could u show me some links to differential antenna products which has a 250ohm resistance?Thank u!

 

[khouly]

Antenna connection

250 ohm , or 5o ohm

khouly

 

[zhaofeng1983]

Antenna connection

250 ohm

Added after 12 minutes:

khouly, do u know how to model the pad and bonding wire? And how much attenuation should be considered in matching network?