Communications: directive radio wave systems and devices (e.g. – With particular circuit
Patent
1986-03-12
1987-07-21
Gensler, Paul
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
333 17M, 333 32, G01S 702
Patent
active
046821767
ABSTRACT:
A transmit/receive module is disclosed that provides selectable impedance matching between: a power amplifier and the antenna of a phased array when the radar is transmitting, and selectable impedance matching between the antenna and a low noise amplifier when the radar is receiving. The transmit/receive module replaces the conventional fixed impedance matching system with a microprocessor, a plurality of switches and sets of pairs of electrical capacitors, resistors, and inductors. Since the antenna impedance characteristics change with changes of beam angles, the microprocessor directs the switches to configure the electrical components into any one of a number of impedance matching circuits. The microprocessor selects an optimum impedance matching circuit for the power amplifier to maintain maximum power transfer for radar transmission and another optimum impedance matching circuit for the low noise amplifier for minimum noise upon radar signal reception.
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Auton William G.
Gensler Paul
Singer Donald J.
The United States of America as represented by the Secretary of
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