Ultra-high frequency simultaneous transmission and reception head, millimeter wave transmitter - receiver and radar using such a head
First Claim
1. An ultra-high frequency head comprising:
- a microwave oscillator which can be used both as a transmission source and as a local oscillator;
a polarization duplexer having a first, a second and a third port, said first port opening onto a two-way square cross-section guide destined to be connected with transmitting and/or receiving antenna, said second port opening onto a first rectangular cross-section guide coupled with said microwave oscillator and having a straight longitudinal shape, and said third port opening onto a second rectangular cross-section guide having a shape bent in such a manner that it intersects with said first rectangular guide, the rectangular cross-section of both rectangular guides being arranged so as to have the electrical components of the electrical fields to be orthogonal in first and second retangular guides;
a mixer situated in said second rectangular guide in the vicinity of the intersection of said first and second rectangular guides.
1 Assignment
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Accused Products
Abstract
A millimeter wave transmitting and receiving head having an excellent technical quality, which is inexpensive to produce and has minimum overall dimensions. The head has for example a guide with a square cross-section connected by a duplexer provided with fins to two guides having rectangular cross-sections and with crossed polarizations. One of the rectangular guides is semicircular so that it can receive through an opening an orifice of the other rectangular guide. A symmetrical mixer having two diodes receives the signal from the two guides and has two outputs. A Gunn diode-type or avalanche-type oscillator serves as the transmitter and the local signal generator. The head is completed by a receiving amplifier and an antenna for constituting a transmitter-receiver. A radar can be obtained by addition of a quarter-wave plate level with antenna.
13 Citations
5 Claims
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1. An ultra-high frequency head comprising:
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a microwave oscillator which can be used both as a transmission source and as a local oscillator; a polarization duplexer having a first, a second and a third port, said first port opening onto a two-way square cross-section guide destined to be connected with transmitting and/or receiving antenna, said second port opening onto a first rectangular cross-section guide coupled with said microwave oscillator and having a straight longitudinal shape, and said third port opening onto a second rectangular cross-section guide having a shape bent in such a manner that it intersects with said first rectangular guide, the rectangular cross-section of both rectangular guides being arranged so as to have the electrical components of the electrical fields to be orthogonal in first and second retangular guides; a mixer situated in said second rectangular guide in the vicinity of the intersection of said first and second rectangular guides. - View Dependent Claims (3, 4, 5)
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2. An ultra-high frequency head comprising:
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a microwave oscillator which can be used both as a transmission source and as a local oscillator; a polarization duplexer having a first, a second and a third port, said first port opening onto a two-way square cross-section guide destined to be connected with transmitting and/or receiving antenna, said second port opening onto a first rectangular cross-section guide coupled with said microwave oscillator and having a bent longitudinal shape, and said third port opening onto a second rectangular cross-section guide having a straight longitudinal shape and intersecting with said first rectangular guide, the rectangular cross-section of both rectangular guides being arranged so as to have the electrical components of the electrical fields to be orthogonal in first and second rectangular guides; a mixer situated in said second rectangular guide in the vicinity of the intersection of said first and second rectangular guides.
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Specification