Patent US3673510A successfully refreshed from Google Patents.
US3673510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad band high efficiency amplifier
Assignee: Unisys Corp
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Filing: 1970-10-07
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Granted: 1972-06-27
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Expires: 1990-10-07
Abstract
Abstract An active high-efficiency-mode semiconductor device is coupled to oscillating high frequency fields in a transmission line network for amplifying those electromagnetic fields, the apparatus taking the form of a single port high frequency device. The transmission line network provides means for elimination of time delayed triggering of undesired oscillations within the amplifier.
Inventors
- 👤 Martin I Grace
- 👤 Harold J Pratt Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A high frequency energy converter comprising: transmission line means having first and second high frequency conducting means adapted for permitting flow of high frequency energy along said transmission line means, conductive wall means for short circuiting said transmission line means for high frequency currents at one end thereof, semiconductor means forming a first conductive junction with said conductive wall means and a second conductive junction with said first high frequency conducTing means, circuit means for applying a bias field across said semiconductor means, distributed filter means conductively mounted on one of said first or second conducting means and providing an impedance step substantially at said second junction for preventing time delayed triggered operation of said semiconductor means said filter means being adapted to pass high frequency energy of fundamental frequency and to retain in the vicinity of said semiconductor means harmonic energy, and impedance matching means spaced along said transmission line means with respect to said filter means and conductively mounted on one of said first or second conducting means.
Claim 2
Dependent Claim
170 words
A high frequency energy converter comprising: transmission line means having first and second high frequency conducting means adapted for permitting flow of high frequency energy along said transmission line means, conductive wall means for short circuiting said transmission line means for high frequency currents at one end thereof, semiconductor means forming a first conductive junction with said conductive wall means and a second conductive junction with said first high frequency conducTing means, circuit means for applying a bias field across said semiconductor means, distributed filter means conductively mounted on one of said first or second conducting means and providing an impedance step substantially at said second junction for preventing time delayed triggered operation of said semiconductor means said filter means being adapted to pass high frequency energy of fundamental frequency and to retain in the vicinity of said semiconductor means harmonic energy, and impedance matching means spaced along said transmission line means with respect to said filter means and conductively mounted on one of said first or second conducting means.
Claim 3
Dependent Claim
21 words
Apparatus as described in claim 1 wherein said semiconductor means comprises an avalanche transit time diode having a predetermined impedance characteristic.
Claim 4
Dependent Claim
27 words
Apparatus as described in claim 2 wherein said impedance matching means resonates the inductive component of said predetermined impedance characteristic of said diode at said fundamental frequency.
Claim 5
Dependent Claim
54 words
Apparatus as described in claim 1 wherein said transmission line means, said conductive wall means, said semiconductor means, said bias circuit means, said impedance matching means, and said distributed filter means are so arranged and constructed as to provide high frequency electric fields with strong fundamental and harmonic frequency components across said semiconductor means.
Claim 6
Dependent Claim
25 words
Apparatus as in claim 4 wherein said distributed filter means comprises a physically symmetric filter having a low pass band and an upper stop band.
Claim 7
Dependent Claim
24 words
Apparatus as in claim 5 wherein said fundamental frequency falls in said pass band and said harmonic frequency components fall in said stop band.
Claim 8
Dependent Claim
22 words
Apparatus as described in claim 4 wherein said transmission line means comprises coaxial means having inner conductor means and outer conductor means.
Claim 9
Dependent Claim
28 words
Apparatus as described in claim 7 wherein said distributed filter means is located on said inner conductor means and defines an impedance step located adjacent said semiconductor means.
Claim 10
Dependent Claim
41 words
Apparatus as described in claim 4 wherein said transmission line means comprises first conductor means in the form of a 3-sided channel with one open face and second conductor means in the form of septum means symmetrically supported within said channel.
Claim 11
Dependent Claim
32 words
Apparatus as described in claim 9 wherein said filter means comprises a conductive element having leg portions in contact with said first conductor means and a bridging portion overlying said septum means.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |