[time-nuts] Frequencies used for GPS

Brooke Clarke brooke at pacific.net
Thu Oct 20 15:39:28 UTC 2011

Hi Chuck:

Can you tell me the model number of that antenna?

Have Fun,

Brooke Clarke

Chuck Harris wrote:
> Here is the standard antenna for the T-Bolt.  Not a helix, but
> rather some sort of crossed dipole.
> The feed point is the corners of the two V shaped elements, forming
> a sort of bowtie ><  With the ends capacitively coupled to the
> ground plane.
> -Chuck Harris
> Jim Lux wrote:
>>> If anyone can tell me the desirable characteristics of an antenna for
>>> GPS, I would like to know. The antenna will be mounted outside and
>>> needs to be waterproof, so I'm not looking to fit the antenna in a
>>> small package.
>> most GPS antennas are helices of one sort or another (quadrifilar is 
>> popluar) and
>> helices are broad band enough that designing for one gets you all 
>> frequencies.
>> There are also a fair number of microstrip patch antennas out there, 
>> but they tend to
>> need stacked patches to get L1, L2, and L5
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