UWB Antenna, Balun, Matching-Network
following question:
What kind of UWB Antenna is proposed for a Transceiver operating with 7GHz, sending out / receiving bursts with a 1ns window.
And - I have a differential LNA input. Matching I think is only possible for narrow but not wideband operation.. so do I have to match the LNA to 50Ohm or not?
Also the balun is only for narrowband operation, or? How to get to a differential input signal for the LNA then?
Greetings,
Tom
HI tstoll,
I assume you are working with UWB transceiver which has Differential LNA on Its PCB as such transceivers are readily becoming available in market these days.
If you want an antenna for a directive application then try Vivaldi/Antipodal/Balanced antipodal Vivaldi antennas which are directive UWB antennas with good time domain performance i.e it supports 1ns pulses quite well. Without distorting the signal.
Balun is used to enhance the impedance matching over a wide frequency band. Google UWB vivaldi antennas with baluns and you will find alot of articles.
If you are looking omnidirectional UWB antenna then go for any monopole uwb antenna it will work fine with your transceiver.
Hope it helps,
/SC
Hi sweetchoto -
thanks alot for the reply. The complete Transceiver is implemented on-Chip using TSMC 018 technology.
So I summarize:
- External Balun for wideband possible using UWB vivaldi antennas with baluns, (which answer the next point)
- Proposed Antenne = vivaldi antennas
Do you know if there existe Agilent ADS models for such kind of Antennas?
Greetings,
Tom
I dont know that Agilent ADS provides any models for Vivaldi antennas. Never used it for antenna modeling. So cant help you in this regard. But Other softwares such as CST,HFSS provides models for vivaldi antennas as far as i know.
/SC