US3665341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated cavity for a solid state oscillator
Assignee: Hitachi Ltd
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Filing: 1971-01-20
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Granted: 1972-05-23
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Expires: 1991-01-20
Abstract
Abstract A temperature compensated cavity for a solid state oscillator in which part of the conductive plates forming the cavity resonator is constituted by a movable plate, said movable plate being secured to one end of a dielectric rod having a large coefficient of linear expansion, the end of which is supported extensibly, and the other end of which is secured to the extended part of said cavity resonator.
Inventors
- 👤 Kenji Sekine
- 👤 Yoichi Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
H; H03; H03L; H03L1/00; H03L1/02; H03L1/021; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B9/146
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A temperature compensated cavity resonator for a solid state oscillator, comprising a resonant cavity having a movable conductive plate, a solid state oscillating element inserted into said resonant cavity, means for applying a bias voltage to said oscillating element, and a rod-shaped dielectric member having one end secured to a wall of said resonant cavity and the other end thereof supported extensibly within said cavity, a plurality of support projections being provided on the surface of said rodshaped dielectric member along the length thereof, said projections being in contact with the walls of said cavity resonator, said movable conductive plate being fixed to said other end of the dielectric member in spaced relationship to the walls of said cavity.
Claim 2
Dependent Claim
119 words
A temperature compensated cavity resonator for a solid state oscillator, comprising a resonant cavity having a movable conductive plate, a solid state oscillating element inserted into said resonant cavity, means for applying a bias voltage to said oscillating element, and a rod-shaped dielectric member having one end secured to a wall of said resonant cavity and the other end thereof supported extensibly within said cavity, a plurality of support projections being provided on the surface of said rodshaped dielectric member along the length thereof, said projections being in contact with the walls of said cavity resonator, said movable conductive plate being fixed to said other end of the dielectric member in spaced relationship to the walls of said cavity.
Claim 3
Dependent Claim
38 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 1, in which the width of said movable conductive plate is more than one-third the width of the cavity portion of said resonant cavity.
Claim 4
Dependent Claim
89 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 1, in which the length of said movable conductive plate is lambda g/4 in the axial direction of said cavity resonator, where lambda g is the wavelength of the cavity, and the length from the surface of said movable conductive plate facing the cavity portion to the secured end of said rod-shaped dielectric member is lambda g/4 + lambda g/4 Square Root epsilon , where epsilon is the dielectric constant of the rod-shaped dielectric member.
Claim 5
Dependent Claim
132 words
A temperature compensated cavity resonator for a solid state oscillator, comprising a resonant cavity of generally rectangular cross section having a movable conductive plate disposed therein, a solid state oscillating element inserted into said resonant cavity, means for applying a bias voltage to said oscillating element, and a rod-shaped dielectric member having one end secured to an end wall of said cavity and the other end thereof supported extensibly within said cavity facing said oscillating element, a plurality of triangular projections of dielectric material provided on the surface of said rod-shaped dielectric member and contacting the side walls of said cavity so as to support said dielectric member, said movable conductive plate being fixed directly to said other end of said dielectric member in spaced relationship to the walls of said cavity.
Claim 6
Dependent Claim
132 words
A temperature compensated cavity resonator for a solid state oscillator, comprising a resonant cavity of generally rectangular cross section having a movable conductive plate disposed therein, a solid state oscillating element inserted into said resonant cavity, means for applying a bias voltage to said oscillating element, and a rod-shaped dielectric member having one end secured to an end wall of said cavity and the other end thereof supported extensibly within said cavity facing said oscillating element, a plurality of triangular projections of dielectric material provided on the surface of said rod-shaped dielectric member and contacting the side walls of said cavity so as to support said dielectric member, said movable conductive plate being fixed directly to said other end of said dielectric member in spaced relationship to the walls of said cavity.
Claim 7
Dependent Claim
38 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 4, in which the width of said movable conductive plate is more than one-third the width of the cavity portion of said resonant cavity.
Claim 8
Dependent Claim
89 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 5, in which the length of said movable conductive plate is lambda g/4 in the axial direction of said cavity resonator, where lambda g is the wavelength of the cavity, and the length from the surface of said movable conductive plate facing the cavity portion to the secured end of said rod-shaped dielectric member is lambda g/4 + lambda g4 Square Root epsilon , where epsilon is the dielectric constant of the rod-shaped dielectric member.
Claim 9
Dependent Claim
29 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 6, wherein said triangular projections are formed as an integral part of said dielectric member.
Claim 10
Dependent Claim
28 words
A temperature compensated cavity resonator for a solid state oscillator as defined in claim 7, wherein said triangular projections are formed as longitudinal ribs on said dielectric member.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |