초록 ▼

A TCAS receiver/transmitter which uses an improved calibration scheme for improving the ability of the device to transmit in a narrow directional field where the device uses the transmitter frequency source to generate signals for calibration purposes. The calibration uses a technique of simultaneou

A TCAS receiver/transmitter which uses an improved calibration scheme for improving the ability of the device to transmit in a narrow directional field where the device uses the transmitter frequency source to generate signals for calibration purposes. The calibration uses a technique of simultaneously transmitting from two antennas and manipulating the phase of the signal through successive settings. The signals are monitored by the remaining two antennas and calibration adjustments are made in response thereto.

대표청구항 ▼

[ We claim:] [1.]1. A transmitter on board an aircraft for making directionally targeted transmissions to other aircraft, comprising:at least four antenna elements coupled to at least one transmission source operating at a predetermined interrogation frequency; anda transmitter calibration signal so

[ We claim:] [1.]1. A transmitter on board an aircraft for making directionally targeted transmissions to other aircraft, comprising:at least four antenna elements coupled to at least one transmission source operating at a predetermined interrogation frequency; anda transmitter calibration signal source operating at said predetermined interrogation frequency for providing calibration signals used in controlling phase relationship between interrogation signals radiating from said at least four antennas.