US3838362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diplexing coupler for microwave system
Assignee: RANTEC MICROWAVE & ELECTRONICS Inc
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Filing: 1973-06-29
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Granted: 1974-09-24
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Expires: 1993-06-29
Abstract
Abstract A coupler is described for coupling two microwave transmitters or receivers in one frequency band and two microwave receivers or transmitters in a second frequency band to a common central wave guide. The device provides high isolation between the four ports. Energy in a first band of frequencies is coupled to feed wave guides which are dimensioned to transmit this first band of frequencies. These feed wave guides are arranged to handle a pair of separate channels for the first band of frequencies, the signals in one of the channels having the same frequencies but a polarization which is orthogonal to that of the signals of the other channel. A pair of channels in the second band of frequencies, the signals in one channel having the same frequencies but a polarization orthogonal to that in the other channel, may be fed directly to the central wave guide. A branch wave guide is interposed between each of the feed wave guides and the central wave guide for coupling the energy in the first band of frequencies to the central waveguide, the branch wave guides being dimensioned to operate as a cutoff filter at the second band of frequencies (thus preventing such signals from entering the feed wave guides) and a high pass filter at the first band of frequencies.
Inventors
- 👤 L Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:58
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2131; H01P1/16; H01P5/00; H01P5/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
In a diplexing coupler for coupling at least one microwave receiver/transmitter channel in a first band of frequencies and at least one microwave receiver/transmitter channel in a second band of frequencies to a common channel comprising: a central waveguide forming said common channel, feed waveguide means dimensioned to transmit said first band of frequencies, means for coupling the channel at said first band of frequencies to said feed waveguide means, means for coupling the channel at said second band of frequencies to said central waveguide, and branch waveguide means interposed between said feed waveguide means and said central waveguide for coupling said channel at said first band of frequencies therebetween, said branch waveguide means being dimensioned to operate as a cutoff filter at said second band of frequencies and a high pass filter at said first band of frequencies.
Claim 2
Dependent Claim
139 words
In a diplexing coupler for coupling at least one microwave receiver/transmitter channel in a first band of frequencies and at least one microwave receiver/transmitter channel in a second band of frequencies to a common channel comprising: a central waveguide forming said common channel, feed waveguide means dimensioned to transmit said first band of frequencies, means for coupling the channel at said first band of frequencies to said feed waveguide means, means for coupling the channel at said second band of frequencies to said central waveguide, and branch waveguide means interposed between said feed waveguide means and said central waveguide for coupling said channel at said first band of frequencies therebetween, said branch waveguide means being dimensioned to operate as a cutoff filter at said second band of frequencies and a high pass filter at said first band of frequencies.
Claim 3
Dependent Claim
93 words
The coupler of claim 1 wherein there are a first pair of channels at said first band of frequencies and a second pair of channels at said second band of frequencies and further including means for polarizing the outputs of said first pair of channels in mutually orthogonal relationship to each other and means for polarizing the outputs of said second pair of channels in mutually orthogonal relationship to each other. means is positioned alongside said central waveguide, said branch waveguide means having coupling slots formed at its interface with the central waveguide.
Claim 4
Dependent Claim
31 words
The coupler of claim 1 wherein said branch waveguide means is positioned alongside said central waveguide, said branch waveguide means having coupling slots formed at its interface with the central waveguide.
Claim 5
Dependent Claim
54 words
The coupler of claim 2 wherein said feed waveguide means comprises a first and second pair of similar waveguide sections, a portion of each of said paired sections being positioned along an associated pair of walls of the central waveguide to provide a balanced feed of microwave energy to and from said central waveguide.
Claim 6
Dependent Claim
243 words
A diplexing coupler for coupling a first pair of microwave receiver/transmitter channels in a first band of frequencies and a second pair of microwave receiver/transmitter channels in a second band of frequencies to a common channel for reception/transmission therein, comprising: a central waveguide forming said common channel, first feed waveguide means positioned with a pair of the walls thereof parallel to a first pair of the walls of the central waveguide, sEcond feed waveguide means positioned with a pair of the walls thereof parallel to a second pair of the walls of the central waveguide, said first and second feed waveguide means being dimensioned to transmit said first band of frequencies, means for coupling the outputs of said first pair of channels each to a separate one of said first and second feed waveguide means, the polarization of the output coupled to said first feed waveguide means being orthogonal to that coupled to said second feed waveguide means, branch waveguide means interposed between each of said feed waveguide means and central waveguide for coupling said channels therebetween, each of said branch waveguide means being positioned alongside a separate wall of the central waveguide and being dimensioned to operate as a cutoff filter at said second band of frequencies and a high pass filter at said first band of frequencies, and means for coupling the outputs of said second pair of channels to said central waveguide with the polarizations thereof in mutually orthogonal relationship.
Claim 7
Dependent Claim
243 words
A diplexing coupler for coupling a first pair of microwave receiver/transmitter channels in a first band of frequencies and a second pair of microwave receiver/transmitter channels in a second band of frequencies to a common channel for reception/transmission therein, comprising: a central waveguide forming said common channel, first feed waveguide means positioned with a pair of the walls thereof parallel to a first pair of the walls of the central waveguide, sEcond feed waveguide means positioned with a pair of the walls thereof parallel to a second pair of the walls of the central waveguide, said first and second feed waveguide means being dimensioned to transmit said first band of frequencies, means for coupling the outputs of said first pair of channels each to a separate one of said first and second feed waveguide means, the polarization of the output coupled to said first feed waveguide means being orthogonal to that coupled to said second feed waveguide means, branch waveguide means interposed between each of said feed waveguide means and central waveguide for coupling said channels therebetween, each of said branch waveguide means being positioned alongside a separate wall of the central waveguide and being dimensioned to operate as a cutoff filter at said second band of frequencies and a high pass filter at said first band of frequencies, and means for coupling the outputs of said second pair of channels to said central waveguide with the polarizations thereof in mutually orthogonal relationship.
Claim 8
Dependent Claim
58 words
The coupler of claim 5 wherein the means for coupling the channels between the feed waveguide means and the branch waveguide means and between the branch waveguide means and the central waveguide includes coupling slots at the interface between the feed and branch waveguide means and at the interface between the branch waveguide means and the central waveguide.
Claim 9
Dependent Claim
19 words
The coupler of claim 5 wherein the second band of frequencies is lower than the first band of frequencies.
Claim 10
Dependent Claim
54 words
The coupler of claim 5 wherein the means for coupling the outputs of said first pair of channels to said feed waveguide means comprises a rotary joint for each of said feed waveguide means, the rotary joint for said first feed waveguide means being oriented orthogonally to that for said second feed waveguide means.
Claim 11
Dependent Claim
36 words
The coupler of claim 5 wherein the means for coupling the outputs of said first pair of channels to said feed waveguide means and said second pair of channels to said central waveguide comprise 180* plates.
Claim 12
Dependent Claim
50 words
The coupler of claim 5 wherein said first and second feed waveguide means each comprises a pair of similar waveguide sections, a portion of each of said paired sections being positioned along an associated pair of walls of the central waveguide to provide a balanced feed to said central waveguide.
Claim 13
Dependent Claim
41 words
The coupler of claim 5 wherein said first feed waveguide means is dimensioned for transmission of the TE01 mode of the microwave energy and said second feed waveguide means is dimensioned for transmission of the TE10 mode of the microwave energy.
Claim 14
Dependent Claim
26 words
The coupler of claim 5 wherein the means for coupling the outputs of said second pair of channels to said central waveguide comprises an orthomode junction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |