Patent US3600708A successfully refreshed from Google Patents.
US3600708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave limiter
Assignee: Skyworks Solutions Inc
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Filing: 1969-12-17
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Granted: 1971-08-17
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Expires: 1989-12-17
Abstract
Abstract A microwave device for use in limiting an RF signal includes two terminal pairs, an outer conductor defining a cavity and first and second inner conductors within the cavity. Each inner conductor is respectively coupled to a signal terminal of the terminal pairs. Within the cavity, a diode chip has one of its terminals connected to the first inner conductor and its other terminal connected to the outer conductor. A second diode chip, oppositely poled, has one of its terminals connected to the second inner conductor and its other terminal connected to the outer conductor. A third inner conductor within the cavity intercouples the terminals of the diode chips coupled to the inner conductors. Preferably, the first diode chip is a highpower type and the second diode chip rectifies at a lower power level and pumps signal through the first diode chip when high power is incident to the device, thereby limiting the signal level at the output terminal to the rectification level of the second diode chip.
Inventors
- 👤 Philip E King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:07
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; H03G11/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
235 words
High frequency apparatus comprising, conducting means defining a cavity, first and second inner conductors within said cavity, first and second terminal pairs with each pair having a reference terminal intercoupled by said conducting means, said first terminal pair having a signal terminal coupled to an end of said first inner conductor, said second terminal pair having a signal terminal coupled to an end of said second inner conductor, means defining at least first and second diode chips within said cavity, said first diode chip interconnecting the remaining end of said first inner conductor in rectifying contact with said conducting means and conductive only in response to at least a first predetermined signal level on said first inner conductor, said second diode chip interconnecting the remaining end of said second inner conductor in rectifying contact with said conducting means and conductive only in response to at least a second predetermined signal level on said second inner conductor that is less than said first predetermined signal level, and means including a third inner conductor intercoupling said first and second inner conductors, said diode chips poled for opposite conduction on application of an RF signal to said inner conductors, said first, second and third inner conductors comprising substantially inductive means coacting with the effective capacitance of said diode chips in their nonconducting states between said inner conductors and said conducting means to define a substantially reflectionless filter circuit.
Claim 2
Dependent Claim
235 words
High frequency apparatus comprising, conducting means defining a cavity, first and second inner conductors within said cavity, first and second terminal pairs with each pair having a reference terminal intercoupled by said conducting means, said first terminal pair having a signal terminal coupled to an end of said first inner conductor, said second terminal pair having a signal terminal coupled to an end of said second inner conductor, means defining at least first and second diode chips within said cavity, said first diode chip interconnecting the remaining end of said first inner conductor in rectifying contact with said conducting means and conductive only in response to at least a first predetermined signal level on said first inner conductor, said second diode chip interconnecting the remaining end of said second inner conductor in rectifying contact with said conducting means and conductive only in response to at least a second predetermined signal level on said second inner conductor that is less than said first predetermined signal level, and means including a third inner conductor intercoupling said first and second inner conductors, said diode chips poled for opposite conduction on application of an RF signal to said inner conductors, said first, second and third inner conductors comprising substantially inductive means coacting with the effective capacitance of said diode chips in their nonconducting states between said inner conductors and said conducting means to define a substantially reflectionless filter circuit.
Claim 3
Dependent Claim
34 words
High frequency apparatus as set forth in claim 1 and further comprising first and second capacitive means for respectively coupling said first and second inner conductors to the first and second signal terminals respectively.
Claim 4
Dependent Claim
307 words
High frequency apparatus comprising, conducting means defining a cavity, first and second inner conductors within said cavity, first and second terminal pairs with each pair having a reference terminal intercoupled by said conducting means, said first terminal pair having a signal terminal coupled to an end of said first inner conductor, said second terminal pair having a signal terminal coupled to an end of said second inner conductor, means defining at least first, second, third and fourth diode chips within said cavity, a third inner conductor intercoupling oppositely poled terminals of said first and secOnd diode chips, said first and second diode chips intercoupled with said conducting means by their remaining terminals thereby forming a first pair of oppositely poled diode chips, said first and second diode chips conductive only in response to at least first and second predetermined signal levels respectively on said third inner conductor, said third and fourth diode chips conductive only in response to at least third and fourth predetermined signal levels on said fourth inner conductor, said first and second signal levels being greater than said third and fourth signal levels respectively, a fourth inner conductor intercoupling oppositely poled terminals of said third and fourth diode chips, said third and fourth diode chips intercoupled with said conducting means by their remaining terminals thereby forming a second pair of oppositely poled diode chips, and means intercoupling said first and second inner conductors including, said third and fourth inner conductors and a fifth inner conductor, said fifth inner conductor intercoupling said third and fourth inner conductors thereby intercoupling said first and second pairs, said first, second, third, fourth and fifth inner conductors comprising substantially inductive means coacting with the effective capacitance of said diode chips in their nonconducting states between said inner conductors and said conducting means to define a substantially reflectionless filter circuit.
Claim 5
Dependent Claim
307 words
High frequency apparatus comprising, conducting means defining a cavity, first and second inner conductors within said cavity, first and second terminal pairs with each pair having a reference terminal intercoupled by said conducting means, said first terminal pair having a signal terminal coupled to an end of said first inner conductor, said second terminal pair having a signal terminal coupled to an end of said second inner conductor, means defining at least first, second, third and fourth diode chips within said cavity, a third inner conductor intercoupling oppositely poled terminals of said first and secOnd diode chips, said first and second diode chips intercoupled with said conducting means by their remaining terminals thereby forming a first pair of oppositely poled diode chips, said first and second diode chips conductive only in response to at least first and second predetermined signal levels respectively on said third inner conductor, said third and fourth diode chips conductive only in response to at least third and fourth predetermined signal levels on said fourth inner conductor, said first and second signal levels being greater than said third and fourth signal levels respectively, a fourth inner conductor intercoupling oppositely poled terminals of said third and fourth diode chips, said third and fourth diode chips intercoupled with said conducting means by their remaining terminals thereby forming a second pair of oppositely poled diode chips, and means intercoupling said first and second inner conductors including, said third and fourth inner conductors and a fifth inner conductor, said fifth inner conductor intercoupling said third and fourth inner conductors thereby intercoupling said first and second pairs, said first, second, third, fourth and fifth inner conductors comprising substantially inductive means coacting with the effective capacitance of said diode chips in their nonconducting states between said inner conductors and said conducting means to define a substantially reflectionless filter circuit.
Claim 6
Dependent Claim
33 words
High frequency apparatus as set forth in claim 1 wherein said first diode chip includes means defining a PIN diode chip and said second diode chip includes means defining a varactor diode chip.
Claim 7
Dependent Claim
33 words
High frequency apparatus as set forth in claim 3 wherein said first diode chip includes means defining a PIN diode chip and said second diode chip includes means defining a varactor diode chip.
Claim 8
Dependent Claim
22 words
High frequency apparatus in accordance with claim 3 wherein said first predetermined signal level is greater than said third predetermined signal level.
Claim 9
Dependent Claim
21 words
High frequency apparatus in accordance with claim 3 wherein said second predetermined signal level is greater than said predetermined signal level.
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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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |