US3833866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave switching matrix
Assignee: International Standard Electric Corp
•
Filing: 1973-07-20
•
Granted: 1974-09-03
•
Expires: 1993-07-20
Abstract
Abstract An m X n microwave switching matrix is disclosed including orthogonally related microwave transmission lines which may be interconnected by an appropriate number of microwave type switching diodes, such as PIN diodes. According to several disclosed embodiments a different power divider is coupled to each matrix input, each of said power dividers having n outputs, and a different power combiner is coupled to each matrix output, each of said power combiners having m inputs. The outputs of any given power divider are connected to one input of each power combiner by n crosspoints including PIN diodes. Arrangements are also disclosed to equalize path lengths and impedances of the disclosed matrices.
Inventors
- 👤 P Boutelant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:43
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
A microwave switching matrix comprising: an arrangement of orthogonally related microwave transmission lines terminated in matched loads; an electrically switched crosspoint disposed at each intersection of said transmission lines; and a microwave isolator coupled to each input terminal and each output terminal of said arrangement; said arrangement including m input terminals, and n output terminals; said isolators including m power dividers, each of said dividers having n outputs and an input connected to a different one of said input terminals, and n power combiners, each of said combiners having m inputs and an output connected to a different one of said output terminals; and said crosspoints number m X n interconnecting said n outputs of each of said dividers to a different one of said m inputs of each of said combiners.
Claim 2
Dependent Claim
132 words
A microwave switching matrix comprising: an arrangement of orthogonally related microwave transmission lines terminated in matched loads; an electrically switched crosspoint disposed at each intersection of said transmission lines; and a microwave isolator coupled to each input terminal and each output terminal of said arrangement; said arrangement including m input terminals, and n output terminals; said isolators including m power dividers, each of said dividers having n outputs and an input connected to a different one of said input terminals, and n power combiners, each of said combiners having m inputs and an output connected to a different one of said output terminals; and said crosspoints number m X n interconnecting said n outputs of each of said dividers to a different one of said m inputs of each of said combiners.
Claim 3
Dependent Claim
120 words
A matrix according to claim 1, wherein each of said crosspoints includes a first capacitor connected to the associated output of an associated one of said dividers, a second capacitor connected to the associated input of an associated one of said combiners, at least one microwave switching means connected in series between said first and second capacitors, a first inductor coupled between ground and the junction of one terminal of said switching means and said first capacitor, said first inductor and said first capacitor providing high pass filter, a control terminal, a second inductor coupled in series between said control terminal and the other terminal of said switching means, and a third capacitor coupled between said control terminal and ground.
Claim 4
Dependent Claim
99 words
A matrix according to claim 1, wherein each of said crosspoints includes a first capacitor connected to the associated output of an associated one of said dividers, a second capacitor connected in series with said first capacitor and to the associated input of an associated one of said chamberS, at least one microwave switching means connected between ground and the junction of said first and second capacitors, a control terminal, an inductor coupled in series between said control terminal and the junction of said first and second capacitors, and a third capacitor coupled between said control terminal and ground.
Claim 5
Dependent Claim
64 words
A matrix according to claim 1, further including two orthogonally related sets of parallel substrates containing microwave integrated circuits, said substrates of one of said sets of substrates containing said dividers, said substrates of the other of said sets of substrates containing said power dividers, and said substrates of one of said one and said other of said sets of substrates containing said crosspoints.
Claim 6
Dependent Claim
28 words
A matrix according to claim 1, wherein each of said isolators include a microwave circulator having three ports with one of said ports terminated in a matched load.
Claim 7
Dependent Claim
72 words
A matrix according to claim 1, further including a first set of microwave transmission lines having increasing lengths connected to said input terminals, and a second set of microwave transmission lines having increasing lengths connected to said output terminals, said first and second sets of microwave transmission lines cooperating to equalize the electrical length of the signal path between any one of said input terminals and any one of said output terminals.
Claim 8
Dependent Claim
68 words
A matrix according to claim 6, further including an increasing number of impedances connected betwen said transmission lines of said first and second set of microwave transmission lines to equalize the impedance encountered by a microwave signal transmitted from any one of said input terminals to any one of said output terminals; each of said impedances having an impedance equivalent to the impedance presented by one open crosspoint.
Claim 9
Dependent Claim
42 words
A matrix according to claim 1, wherein each of said input terminals is coupled to a different horizontal microwave transmission line of said arrangement; and each of said output terminals is coupled to a different vertical microwave transmission line of said arrangement.
Claim 10
Dependent Claim
135 words
A matrix according to claim 8, wherein each of said crosspoints includes a first pair of capacitors disposed in spaced relation in an associated one of said horizontal transmission lines, a second pair of capacitors disposed in spaced relation in an associated one of said vertical transmission lines, at least one microwave switching means connected between the junction of said first pair of capacitors and the junction of said second pair of capacitors, a first inductor coupled between ground and the junction of said first pair of capacitors, said first inductor and one capacitor of said first pair of capacitors providing a high pass filter, a control terminal, a second inductor coupled between said control terminal and the junction of said second pair of capacitors, and a capacitor coupled between said control terminal and ground.
Claim 11
Dependent Claim
22 words
A matrix according to claim 9, wherein each of said first and second inductors are provided by a quarter wavelength transmission line.
Claim 12
Dependent Claim
66 words
A matrix according to claim 9, wherein said horizontal and vertical transmission lines are microstrip lines carried by a common substrate, and each of said crosspoints include an associated one of said horizontal and vertical transmission lines folded 90* so as not to cross each other, and said switching means interconnecting said associated one of said horizontal and vertical transmission line at the 90* fold point.
Claim 13
Dependent Claim
46 words
A matrix according to claim 11, wherein said associated one of said horizontal and vertical transmission lines are folded a second time by 90* and cross each other by a wired bridge present in one of said associated one of said horizontal and vertical transmission lines.
Claim 14
Dependent Claim
35 words
A matrix according to claim 9, wherein each of said crosSpoints include two orthogonally related microstrip transmission lines disposed of a common substrate, said two microstrip transmission lines crossing each other by a wired bridge.
Claim 15
Dependent Claim
26 words
A matrix according to claim 13, wherein said bridge includes two superimposed microstrip lines, and said microwave switching means is disposed between said superimposed microstrip lines.
Claim 16
Dependent Claim
122 words
A matrix according to claim 13, wherein said bridge includes a second substrate superimposed on one of said microstrip transmission lines of said common substrate, said other of said microstrip transmission lines of said common substrate being interrupted, a third microstrip transmission line disposed on said second substrate, a first pair of wires connected between said third microstrip transmission line and the adjacent ends of said other of said microstrip transmission lines of said common substrate, said microwave switching means formed on said second substrate, a third wire connected between said third microstrip transmission line and said microwave switching means, and a fourth wire connected between said microwave switching means and said one of said microstrip transmission lines of said common substrate.
Claim 17
Dependent Claim
42 words
A matrix according to claim 15, wherein each port of each of said crosspoints includes an L-shaped line-matching microstrip device having a stub, the length and impedance of said stub being selected to resonate with the susceptance of said microwave switching means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |