Passive electromagnetic wave duplexer for millimetric antenna
First Claim
1. A passive duplexer for electromagnetic waves, within a radar system comprising a transmitter operating in the millimetric range, a receiver operating in the millimetric range, and an antenna fed by said transmitter and also redirecting electromagnetic signals received from a target to said receiver, comprising:
- a first horn adapted to be connected to said transmitter and having a propagation axis Δ
1 ;
a second horn adapted to be connected to said receiver and having a propagation axis Δ
2 orthogonal to said axis Δ
1 ; and
plane circular grid means formed by a dielectric disc metallized on one surface thereof for reflecting or passing incident signals depending upon the power level of said incident signals, said grid means being inclined at a 45°
angle with respect to said axes Δ
1 and Δ
2, said metallized surface having a network of resonant slots for passing said incident signals each slot including a diode in conducting relation thereacross.
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Accused Products
Abstract
A passive duplexer for electromagnetic waves operated within the millimetric wave range. The duplexer comprises a first horn associated with a radar transmitter and having a propagation axis (Δ1), a plane circular grid inclined at 45° with respect to (Δ1), and a second horn associated with the radar receiver and having an axis (Δ2) at right angles to (Δ1). The grid is formed by a network of resonant slots equipped with at least one diode.
21 Citations
9 Claims
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1. A passive duplexer for electromagnetic waves, within a radar system comprising a transmitter operating in the millimetric range, a receiver operating in the millimetric range, and an antenna fed by said transmitter and also redirecting electromagnetic signals received from a target to said receiver, comprising:
-
a first horn adapted to be connected to said transmitter and having a propagation axis Δ
1 ;a second horn adapted to be connected to said receiver and having a propagation axis Δ
2 orthogonal to said axis Δ
1 ; andplane circular grid means formed by a dielectric disc metallized on one surface thereof for reflecting or passing incident signals depending upon the power level of said incident signals, said grid means being inclined at a 45°
angle with respect to said axes Δ
1 and Δ
2, said metallized surface having a network of resonant slots for passing said incident signals each slot including a diode in conducting relation thereacross. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. A passive duplexer for electromagnetic waves, within a radar system comprising a transmitter operating in the millimetric range, a receiver operating in the millimetric range, and an antenna fed by said transmitter and also redirecting electromagnetic signals from a target to said receiver, comprising:
-
a first horn adapted to be connected to said transmitter and having a propagation axis Δ
1 ;a second horn adapted to be connected to said receiver and having a propagation axis Δ
2 orthogonal to said axis Δ
1 ; andplane circular grid means, formed by a semiconductor disc metallized on one surface thereof for reflecting or passing incident signals depending upon the power level of said incident signals, said grid means being inclined at a 45°
angle with respect to said axes Δ
1 and Δ
2, said metallized surface having a network of resonant slots for passing said incident signals each slot including a diode in conducting relation thereacross.
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Specification