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Forum message about 14 GHz down-converters for sale

14-14.5 GHz to L band, low noise down-converters

14 to 14.5 GHz Ku-band PLL down-converters with local oscillator frequency of 13.05 GHz.

Intended for earth station transmit monitoring (loop test translator):

Monitor the 14-14.5 band, satellite uplink at a teleport hub or VSAT terminal.  Input is 14 - 14.5 GHz and output 950-1450 MHz so you may use L band spectrum analysers and normal modems to monitor your transmit signals.

Also suitable* for terrestrial microwave links, using VSAT satellite dish antennas and Ku band BUCs:

In several countries it is now allowed to install and to operate also 14GHz terrestrial microwave links, provided that the direction of pointing of the antennas is not towards the horizon in either of the two directions where the geostationary orbit meets the horizon, as in such cases the antenna would be pointed at a very low elevation satellite. Point to point links over distances of 40 km have been reported.
* Check with your country radio regulatory authority about 14 GHz radio relay links.


For monitoring Ku band VSAT and earth station transmissions and as local loop test translator.  Together with low power Ku band transmit BUC may be used for line of sight terrestrial microwave relay links, subject to local regulations and avoidance of pointing the antennas at low elevation satellites.  Ideal for reception of both wideband and narrowband carrier due to high stability PLL 10E-6 local oscillator.  Could even be used to build half a satellite transponder (educational) !

14 GHz to L band downconverter
Note the name on the lable: "AMIWIMA", possibly of German or China origin/manufacture ?

RF input: 14 - 14.5 GHz
Input VSWR: 2.5:1 max
Input connector: WR-75 waveguide
Input level: -10 dBm max
Input noise figure: 0.9 dB
Conversion gain: > 40 dB.

Frequency: 950 - 1450 MHz.
Output VSWR: 2.3:1 max
Output connector F type female
Output impedance: 75 ohm
Output level (P1dB): 0 dBm min.

LO frequency = 13.05  stability 1.0ppm @ 0 to 50deg C

DC input voltage: +14 to +24V DC
DC input current:  260mA typical

Operating temp: -20 top +60 degC
Vibration: 4G 50 Hz
Shock: 10G max
Size: 11.5 x 4 x 4 cm
Mass: 0.3kg max

All specifications and colour are subject to change without prior notice.

The identity and source of this device was a puzzle.  I believe is is called AMIWIMA with model no: DOC-PLL-14GHZ-S. May be available from ALLSAT W. S. GMBH, Address : Postfach 1260, Hauenstein Germany, Telephone: 49-6392-994166

► Page created  15th April 2009, amended 8 August 2015   Eric Johnston

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