TRF3705 Question

Derek Xie

Genius 12255 points

Other Parts Discussed in Thread: TRF3705

Hi Team:

One issue need your help to give some suggestions.

TRF3705's output has 4 standing wave.

1. Customer use below schematic to design the TRF3705.

2. Their input design is follow our datasheet reference design like below:

They are asking how to design the output's impedance match?

Or there will be other need to consider? Thanks.

over 9 years ago

0 Derek Xie over 9 years ago

TI__Genius 12255 points

The input frequency is around 930~934MHz

0 RJ Hopper over 9 years ago in reply to Derek Xie

TI__Mastermind 18095 points

The TRF3705 employs a broadband integrated balun on the output network. A conjugate match yields best power transfer and best performance. At 900 MHz, the standard recommended matching components should suffice since the balun is operating within its optimum range of 700 MHz - 2700 MHz. You may opt to tweak the match specific for your band or layout parasitics. Reference this app note, http://www.ti.com/lit/pdf/slaa525, to provide further guidance.

--RJH

RF & microwave

RF & microwave forum

TRF3705 Question