These units are for the receiver (subscriber) end. They are relatively
compact, and connect with a standard 'type F' coaxial cable to the tuner box.
Many models are available, please contact us for details. In the photo is shown
the most popular antenna/downconverter design on the lower left (the 8"
gold-colored dish, DL Version 1), our newer higher-gain antenna/downconverter
design (Medium cost) on the right (with the larger 12" dish), and another new
design on top (Low cost). The Antenna/Downconverters are available for all
applications from 25.5 to 31.3 GHz. Antenna/Downconverters and
tuner boxes are manufactured
in the USA and Korea.
This 8" Antenna unit was our first production Antenna/Downconverter (DL
Version 1). This version has been replaced by a newer version having molded
plastic packaging. It is a low cost unit (<$130) and many thousands of this
basic unit have been used worldwide.
The 12" Antenna/Downconverter unit
shown at right is our Premium Performance unit and is recommended for 28 and 29
GHz applications.
Antenna Gain: 36 dBi with 12" dish
Input Center Frequency: 27.5 to
28.5 GHz or 28.5 to 29.5 GHz
IF Output Frequency: 1000 MHz to 2000
MHz
Operating Bandwidth: 1.0 GHz minimum
Noise Figure: 6.5 dB
maximum
Frequency Stability: +/- 1 MHz
Operating Temperature: -30 to +45
C
DC Power: +12 VDC, from tuner box via IF cable
Package: See
photograph
Output connector: Type F coaxial
For 2-Way data applications, we have a
12" antenna (36 dBi) with both downconverter and upconverter units built into a
single housing and sharing the same antenna. The receive performance
specifications are the same as the 12" unit above. Specifications for the
transmitter section are shown below.
2-Way Receiver: See 12" Downconverter above for specifications
2-Way
Transmitter:
Power Output: 0.1 Watt
RF Frequency: 31 GHz (other options
available)
RF Bandwidth: 100 MHz minimum
We have conducted a comparison test of all the Antenna/Downconverter combinations available to us, below is a summary of the results. Attenuator Setting is a relative attenuation in dB of the test transmitter power that provides the same picture quality at the subscriber location. All testing was conducted at an RF frequency of 28 GHz.
| Downconverter | Antenna Type | Change in Attenuation (more is better) | Notes | Applications |
| DL Version 1 1992 | 8" Dish | 0 (reference) | No LNA | Discontinued (note 1) |
| DL Version 2 | 8" Dish | +7 | No LNA | Discontinued |
| DL Version 3 | 12" Dish | +11 | External LNA | Test use only |
| DL Version 4 1998 | 8" Dish | +11 | No LNA | Low Cost (note 2) |
| DL Version 5 1998 | 8" Dish | +18 | With LNA | Test use only |
| DL Version 6 1998 | 12" Dish | +15 | No LNA | Medium Cost (note 3) |
| DL Version 7 1998 | 12" Dish | +22 | With LNA | Premium Cost (note 4) |
| Vendor 1 | 8" Flat Panel | +7 | No LNA | (note 5) |
| Vendor 1 | 8" Flat Panel | +18 | With LNA | (note 6) |
| Vendor 2 | 12" Dish | +10 | No LNA | (note 7) |
| Vendor 3 | 8" Dish | +13 | 1 Stage LNA | (note 8) |
| Vendor 4 | 8" Dish | +13 | 1 Stage LNA | (note 8) |
Notes:
1. Over 5,000 of these units have been built in Korea,
and are currently being used in Venezuela.
2. Approx. Cost $200 Qty. 1,000.
This is our lowest cost unit and is recommended for short range, single
subscriber applications.
3. Approx. Cost $250 Qty. 1,000. This is a medium
cost unit and is recommended for short range, single subscriber
applications.
4. Approx. Cost $300 Qty. 100. This is our Premium unit and is
recommended for longer range, single or multiple subscribers.
5. Thousands
of these units have been manufactured by Vendor 1 and used worldwide.
6.
This is the latest version of Vendor 1's unit with an LNA. Few, if any, are in
use.
7. Over 10,000 of these units have been sold in Asia by Vendor 2.
8.
These Vendors are currently building prototype units for the Korean
market.
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