Adjustable resonator arrangement
First Claim
1. An adjustable resonator arrangement comprising:
- a primary resonator operating at a primary resonant frequency,a secondary resonator capable of operating in one of two selectable resonant frequency states, said secondary resonator being disposed within an electromagnetic field of said primary resonator thus providing signal coupling therebetween whereinsaid secondary resonator first of said two selectable resonant frequency states is a resonant frequency sufficiently different from said primary resonant frequency of said primary resonator such that no effect is realized upon said primary resonator operating resonant frequency,and wherein said second of said two selectable frequency states is a frequency significantly and sufficiently nearer to said primary operating resonant frequency than said secondary resonator first resonant frequency to cause a change in said primary resonator frequency when said secondary resonator is operated at said second selectable resonant frequency state.
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Accused Products
Abstract
An adjustable resonator arrangement comprises a main resonator (T1) and a secondary resonator (T2) reactively coupled thereto. The secondary resonator includes a switching element (S), e.g. a varactor, having at least two states. When the switching element is in a first state the secondary resonator behaves as a half-wave resonator having a resonant frequency fo substantially different to the resonant frequency f of the main resonator. Consequently the secondary resonator has no appreciable affect on the resonant frequency of the main resonator. However, when the switching element is in a second state, the secondary resonator behaves as a quarter-wave resonator having a resonant frequency 2*fo which is closer to the inherent frequency f of the main resonator and sufficiently close to cause a shift Δf in the effective frequency of the main resonator. Suitably the main resonator is realized as a dielectric resonator and the secondary resonator is realized as a strip line resonator in the form of a conductive strip provided on a side face of the dielectric block from which the main resonator is formed.
89 Citations
29 Claims
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1. An adjustable resonator arrangement comprising:
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a primary resonator operating at a primary resonant frequency, a secondary resonator capable of operating in one of two selectable resonant frequency states, said secondary resonator being disposed within an electromagnetic field of said primary resonator thus providing signal coupling therebetween wherein said secondary resonator first of said two selectable resonant frequency states is a resonant frequency sufficiently different from said primary resonant frequency of said primary resonator such that no effect is realized upon said primary resonator operating resonant frequency, and wherein said second of said two selectable frequency states is a frequency significantly and sufficiently nearer to said primary operating resonant frequency than said secondary resonator first resonant frequency to cause a change in said primary resonator frequency when said secondary resonator is operated at said second selectable resonant frequency state. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 22, 26, 28)
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2. A main transmission line resonator device comprising:
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a body of dielectric material having upper and lower surfaces, two side surfaces, two end surfaces and a hole with an interior surface, said hole extending from said upper surface to said lower surface, an electrically conductive layer covering major portions of said lower surface, one of said two side surfaces, both of said end surfaces and said interior surface of said hole, thereby forming said main transmission line resonator, an electrode pattern disposed upon one of said two side surfaces for providing an electrical--signal coupling to said main transmission line resonator and an electrically conductive strip disposed upon one of said two side surfaces of said main transmission line resonator device forming at least part of a transmission line secondary resonator, said secondary resonator having at least two selectable operative frequency states whereby in a first operative frequency state said secondary resonator operates at a first resonant frequency sufficiently different from said main transmission line resonator operative frequency so as not to have any effect thereon, and in a second resonant frequency state said secondary resonator operates at a second resonant frequency sufficiently close to said main transmission line resonator operative frequency to effectively change said main transmission line resonator operative frequency. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 27, 29)
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Specification