US4465990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave detector arrangement
Assignee: US Philips Corp
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Filing: 1981-10-13
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Granted: 1984-08-14
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Expires: 2001-10-13
Abstract
Abstract A microwave detector arrangement operable over a broad range of frequencies including the series resonant frequency of a detector diode (9) for detecting microwave energy in a transmission line of characteristic impedance Z o , suitably a coplanar line. A first portion of line, including a strip conductor (3), is terminated by a network, including a capacitance (4) and a first resistance (5) in series with one another and with the parallel combination of a second resistance (6) and the diode (9). The capacitance (4) provides D.C. isolation, while the detector output is taken across a capacitance (10) in series with the diode (9). The first and second resistances (5,6) are respectively 2Z o /3 and 3Z o /2, so that the terminating impedance provides a reasonable match to the line over a broad frequency range.
Inventors
- 👤 Peter J. Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:39
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
175 words
A microwave detector arrangement including a detector diode for detecting microwave energy in a portion of transmission line having a characteristic impedance Z o , at frequencies in a broad band including the series resonant frequency f o of the diode, said arrangement including a terminating network electrically-connected to the transmission line and comprising a plurality of impedances including: a. a first resistance having a magnitude substantially smaller than Z o ; and b. a parallel combination comprising the diode and a second resistance, said combination being electrically-connected in series with the first resistance; the first and second resistances having magnitudes such that, over said broad band of frequencies, the sum of the first resistance and the impedance of the parallel combination substantially matches that of the characteristic impedance Z o , the magnitude of the second resistance being sufficiently large to enable effective operation of the diode as a current detector at f o and at frequencies near f o , and as a voltage detector at frequencies substantially different from f o .
Claim 2
Dependent Claim
175 words
A microwave detector arrangement including a detector diode for detecting microwave energy in a portion of transmission line having a characteristic impedance Z o , at frequencies in a broad band including the series resonant frequency f o of the diode, said arrangement including a terminating network electrically-connected to the transmission line and comprising a plurality of impedances including: a. a first resistance having a magnitude substantially smaller than Z o ; and b. a parallel combination comprising the diode and a second resistance, said combination being electrically-connected in series with the first resistance; the first and second resistances having magnitudes such that, over said broad band of frequencies, the sum of the first resistance and the impedance of the parallel combination substantially matches that of the characteristic impedance Z o , the magnitude of the second resistance being sufficiently large to enable effective operation of the diode as a current detector at f o and at frequencies near f o , and as a voltage detector at frequencies substantially different from f o .
Claim 3
Dependent Claim
20 words
A detector arrangement as in claim 1 where said impedances include a filter capacitance connected in series with the diode.
Claim 4
Dependent Claim
21 words
A detector arrangement as in claim 2 where said impedances further include a filter capacitance in series with the first resistance.
Claim 5
Dependent Claim
23 words
A detector arrangement as in claim 1, 2 or 3 including additional portions of transmission line interconnecting said impedances of the terminating network.
Claim 6
Dependent Claim
15 words
A detector arrangement as in claim 4 where the transmission line is a coplanar line.
Claim 7
Dependent Claim
27 words
A detector arrangement as in claim 5 where the additional portions of transmission line are disposed on a common substrate and have a common ground plane conductor.
Claim 8
Dependent Claim
28 words
A detector arrangement as in claim 6 where said transmission line includes spaced-apart central conductors electrically-connected by said first resistance which bridges the space between said central conductors.
Claim 9
Dependent Claim
35 words
A detector arrangement as in claim 6 including a central conductor electrically connecting said first and second resistances, said ground plane conductor extending along opposite sides of the central conductor and around the second resistance.
Claim 10
Dependent Claim
20 words
A detector arrangement as in claim 8 where the second resistance electrically-connects the central conductor and the ground plane conductor.
Claim 11
Dependent Claim
23 words
A detector arrangement as in claim 9 where the second resistance bridges a gap between the central conductor and the ground plane conductor.
Claim 12
Dependent Claim
26 words
A detector arrangement as in claim 10 where the second resistance is a graded resistance having a resistivity which increases with distance from the central conductor.
Claim 13
Dependent Claim
16 words
A detector arrangement as in claim 9 where the diode is disposed above the second resistance.
Claim 14
Dependent Claim
29 words
A detector arrangement as in claim 1, 2 or 3 where the magnitudes of the first and second resistances are approximately 2Z o /3 and 3Z o /2, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |