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Multisurface coupled coaxial resonator

A coaxial resonator and resonator technology, applied in resonators, waveguide-type devices, circuits, etc., can solve the problem of high manufacturing cost, and achieve the effect of low manufacturing cost and reducing the number of components

Inactive Publication Date: 2004-01-21
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, dielectric resonators have the disadvantage of higher manufacturing costs

Method used

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  • Multisurface coupled coaxial resonator
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  • Multisurface coupled coaxial resonator

Examples

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Embodiment Construction

[0039] The coaxial resonator shown in Figure 1 has been outlined above in connection with the description of the prior art. If the resonator in question is used for a frequency of 900 MHz, the resonator length l is about 8 cm. The side wall D of the outer conduit and the diameter d of the inner conduit can be selected according to the allowable power consumption. However, there is an optimum value for the D / d ratio, approximately 3, which maximizes the Q value if the waveform is transverse electromagnetic (TEM). In Figures 1a and 1b, two thin metal sheets 105, 106 are also fixed to the inner conduit, whereby the metal sheets achieve a capacitive connection with the resonator and the top. The connection can also be inductive, in which case the connection should be made at the low end of the resonator. Tuning of the resonator shown in Figure 1 is normally performed by means of screws secured to the resonator cover. This screw forms a small adjustable capacitor with the inner ...

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Abstract

The invention relates to an air-insulated coaxial resonator, which is particularly suitable for a structural part in duplex filters. The resonator has an inner conductor (301) extended at one end, so that it forms extra capacitance with the cover (303) of the resonator and the upper part (302y) of the outer conductor. Because of the extra capacitance, a resonator of a certain frequency is shorter than a corresponding quarter-wave resonator. Because of this it is also mechanically stronger and is more stable in its properties. The extension of the inner conductor and the shortening of the construction also have a dissipation-reducing effect. The extension (304, 305, 306a, 306b) can also be used for tuning the resonator and for coupling to the adjacent circuit elements. In a construction according to the invention, a third harmonic of the basic frequency component does not occur, which is a remarkable advantage in the manufacture of filters.

Description

technical field [0001] The invention relates to a resonator according to the preamble of claim 1, which is particularly suitable for use as a component of a bidirectional filter in a radio device. Background technique [0002] Resonators are the main building blocks for oscillators and filters. Important properties of a resonator include eg: (Q value), volume, tunability, tendency to oscillate at the resonant frequency, mechanical stability, temperature and humidity stability, and manufacturing cost. [0003] The resonator structures known so far are as follows: [0004] 1) Resonators composed of discrete components such as capacitors and inductors. [0005] This type of resonator is necessarily accompanied by the disadvantage of internal friction of the components, so its Q value is significantly lower compared with other types. [0006] 2) Microstrip resonators [0007] Microstrip resonators are formed, for example, in conductor regions on the surface of a circuit boar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/205H01P7/04
CPCH01P7/04H01P1/2053
Inventor 杜莫·拉蒂安提·卡内尔沃
Owner INTEL CORP
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