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Re: [Discuss-gnuradio] Antenna compatibility problem

From: Kevin McQuiggin
Subject: Re: [Discuss-gnuradio] Antenna compatibility problem
Date: Tue, 22 Mar 2016 10:00:03 -0700

Hi SangHyoeg:

If you want a good introduction to antennas, designed for the non-professional (typically, ham radio enthusiasts), I suggest "The ARRL Antenna Book for Radio Communications”.  As an engineer, you will find the material easy to read and understand.  The book will give you necessary background information on antennas, impedance, matching, antenna types, antenna dimensions, etc.  I have an old copy from the 1970s and still refer to it often.

On Amazon:


Hope this helps,


On Mar 22, 2016, at 7:59 AM, Nikos Balkanas <address@hidden> wrote:


1) Center frequency​ 1.5 Ghz. ANT500 performs well from 75Mhz - 1 Ghz. Outside its optimal range, you can find better antenna.
2) Center frequency 325 Mhz. This is within ANT500's nominal range, but outside your board's range. You will have problems with your board.

As Marcus Muller suggested, you best carry this conversation to USRP-users.


On Tue, Mar 22, 2016 at 4:44 PM, SangHyoeg Kim <address@hidden> wrote:

ANT supports 75MHz - 1Ghz, but CBX supports 1.2GHz - 6GHz. 

I am confusing coverage of antenna and daughter board. 

What means these range?

Is this situation possible? 
- Center frequency 1.5Ghz with ANT500 
- Center frequency 325MHz with ANT500


2016. 3. 22. 오후 8:58 Nikos Balkanas <address@hidden> 작성:


There is no problem using these antennas with your board, as long as you terminate them correctly, 50 O.
You choose your antenna based on your coverage, not your board. So what coverage do you need?


On Tue, Mar 22, 2016 at 1:39 PM, SangHyuk Kim <address@hidden> wrote:

I'm using CBX daughter board which supports from 1.2GHz to 6.0GHz with ANT500 (from 75MHz to 1GHz).

Actually, I didn't know this antenna coverage. 

I have two question.

i) Is there any problem when I use ANT500 with CBX ?
I have tested QAM and QPSK performance using OFDM using those devices and the results are poor(very unstable, too many bit error in very short range).
So, I doubt this is antenna compatibility with CBX.

ii) Which antenna is best for CBX 40MHz(1.2GHz-6.0GHz) and USRP N210 ?
There are three products:
1) VERT400 (144MHz, 400MHz, 1200MHz Triband)
2) VERT900 (824-960MHz, 1710-1990MHz Dualband)
3) VERT2450 (2.4-2.5 and 4.9-5.9GHz Dualband)


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