1. The aperture efficiency ranges from 0.4 to 0.8 in practical horn antennas . 2. Type 33 was still another 10-cm set; this one used separate round-horn antennas . 3. The Type 32 was another 10-cm system, this one having separate square-horn antennas . 4. Horn antennas can also be constructed with high gain, but are less commonly seen.5. A well-known example of this is the horn antenna . 6. Separate horn antennas were used for transmitting and receiving. 7. TsSO-P had a long horn antenna long and high. 8. Its payload was composed of a multi horn antenna by thirty 45 MHz command and telemetry antenna. 9. The Andover Earth Station was equipped with a giant horn antenna , 7 stories high and weighing 340 tons. 10. The medium-gain horn antennas are used for housekeeping data downlink when the high-gain antenna is not facing Earth.
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