Patent US4467296A successfully refreshed from Google Patents.
US4467296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated electronic controlled diode filter microwave networks
Assignee: Lockheed Martin Tactical Systems Inc
•
Filing: 1982-08-23
•
Granted: 1984-08-21
•
Expires: 2002-08-23
Abstract
Abstract The disclosure relates to improved filter networks for use in the microwave region employing TTL logic and capable of changing a network from a "bandpass state" to an "all-stop state", or an "all pass state", or from a "low-pass state" to an "all pass state". Provision is also made for the increase or decrease in the selectivity of a low-pass filter.
Inventors
- 👤 Morris Cohen
- 👤 Leon M. Underkofler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:30
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/2039; H01P1/10; H01P1/15
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
An improved integrated electronic controlled diode filter microwave network comprising: at least one pair of inductively coupled transmission lines, one of said lines transmitting a microwave signal, and the other of said lines being disposed adjacent said first line, said signal being induced in said second line; means including a diode for effectively grounding said second conductor when forwardly biased and effectively disconnecting said grounding connection when said diode is rearwardly biased, whereby said construction may serve different functions depending upon the state of bias of said diode and means for controlling the direction of bias of said diode including an rf choke, a switch, directional sources of current and a common ground; both said pair of transmission lines being connected through diodes to ground.
Claim 2
Dependent Claim
125 words
An improved integrated electronic controlled diode filter microwave network comprising: at least one pair of inductively coupled transmission lines, one of said lines transmitting a microwave signal, and the other of said lines being disposed adjacent said first line, said signal being induced in said second line; means including a diode for effectively grounding said second conductor when forwardly biased and effectively disconnecting said grounding connection when said diode is rearwardly biased, whereby said construction may serve different functions depending upon the state of bias of said diode and means for controlling the direction of bias of said diode including an rf choke, a switch, directional sources of current and a common ground; both said pair of transmission lines being connected through diodes to ground.
Claim 3
Dependent Claim
24 words
A construction in accordance with claim 1, further characterized in the provision of plural second transmission lines, each being connected through diodes to ground.
Claim 4
Dependent Claim
17 words
A construction in accordance with claim 2, further characterized in second conductors being disposed in cascaded arrangement.
Claim 5
Dependent Claim
37 words
A construction in accordance with claim 1, further characterized in said pair of transmission lines each having capacitive gaps therein forming individual sections of said conductors, said individual sections each being connected through a diode to ground.
Claim 6
Dependent Claim
29 words
A construction in accordance with claim 1, in which said first conductor is a combline form and said diodes are placed in series between said first and second conductors.
References Cited (Backward Citations)
US2934658A
Cited
US3559108A
Cited
US4004257A
Cited
US4331942A
Cited
US4316159A
Cited
US4375054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |