[hpsdr] Possible Gibraltar antenna

[Jeroen Bastemeijer]

Dear Mike,

I have one of these antennas on my desk (acquired from Ebay, but a 
different source). In general GPS-antennas are O.K., so I shouldn't 
select a specific type for the project.Furthermore, high quality 
GPS-antennas are available from surplus worldwide.
One thing you should keep in mind that the GPS-antenna and the receiver 
usually are a "matched pair". So the right type of antenna depends on 
which type of GPS-receiver one is going to use. The GPS-receiver one 
will be using depends on availability (with other words: what you have 
lying around ;-) ).

Acquiring GPS-modules and/or antennas from Ebay can be difficult, 
certainly if you live outside the US. Not every Ebay-seller is willing 
(able?) to sell abroad. If Gibraltar is able to support a number of 
different modules this would be great. Usually a GPS-module is happy 
when supplied with +5 Volts or +3,3Volts and some backup battery 
(capacitor) source.

For antennas a switchable supply +5V or 3,3V (current limited to say 80 
mA) would be sufficient. Finally, I probably connect the GPS to my 
GPS-distribution amplifier.... so no extra GPS-antenna for me. ;-)

Good luck, 73s Jeroen PE1RGE

Mike Naruta wrote:

>***** High Performance Software Defined Radio Discussion List *****
>Is this a good antenna for Gibraltar?
>
>
>eBay item 270063376615
>NEW +5VDC Active GPS Antenna w/15’ cable & SMA Male Connector
>     Amplifier Module:
>Amplifier Gain:          27dB TypicalNoise Figure:             1.5dB TypicalOutput VSWR:           2.0Max.DC Voltage:               DC +5VDC Current:               22±3mA
>
>
>Antenna:
>Frequency:                 1575.42±3MHzVSWR:                       1.5MaxBandwidth:                 20 MHz Min. at -10 dBAxial Ratio:                3dB TypicalImpedance:                50 ΩPeak Gain:                 4 dBic Min. (7x7 cm ground plane)Gain Coverage:         -4 dBic at -90°~90°(over75% volume)Power Handling:        1 wattPolarization:               RHCP
>
>
>Mike - AA8K_______________________________________________HPSDR Discussion ListTo post msg: hpsdr at hpsdr.orgSubscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.orgHPSDR web page: http://hpsdr.orgArchives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
>
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>

-- 
Ing. Jeroen Bastemeijer

Delft University of Technology
Department of Electrical Engineering
Electronic Instrumentation Laboratory
Mekelweg 4, Room 13.090
2628 CD Delft
The Netherlands

Phone: +31.15.27.86542
Fax: +31.15.27.85755
E-mail: J.Bastemeijer at TUDelft.nl


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