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Tunable ferroelectric resonator arrangement

A resonator, ferroelectric technology, applied in the direction of resonators, circuits, electrical components, etc., can solve the problem of not finding satisfactory

Inactive Publication Date: 2004-11-10
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, no satisfactory solution has been found for the problems associated with inductive losses in tunable ferroelectric resonators

Method used

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  • Tunable ferroelectric resonator arrangement
  • Tunable ferroelectric resonator arrangement
  • Tunable ferroelectric resonator arrangement

Examples

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Embodiment Construction

[0038] Figures 1A-1F To illustrate the low order TM of the circular parallel plate resonator disclosed nmp field distribution, that is, TM 010 、TM 110 、TM 210 、TM 020 、TM 310 、TM 410 -model. Solid lines represent electric currents, dashed lines represent magnetic fields, and dots and crosses represent electric fields. Suppose p = 0, that is, the thickness of the substrate is less than half of the wavelength in the resonator, and the resonator only supports TM nm0 model. The field / current distribution in space is fixed by a coupling device such as a coupled loop, a coupled detector or another resonator.

[0039] Parallel plate resonators in the form of insulating disks or wafers on insulating substrates have found several different microwave applications. If its thickness (d) is less than the wavelength of the microwave in the resonator (λ g ), dg / 2, so that there is no standing wave along the axis of the disk, the resonator is considered to be thin electrically. T...

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Abstract

The present invention relates to a tunable resonating arrangement comprising a resonator apparatus (10), input / output coupling (4) means for coupling electromagnetic energy into / out of the resonator apparatus, and a tuning device (3) for application of a biasing voltage / electric field to the resonator apparatus. The resonator apparatus comprises a first resonator (1) and a second resonator (2). Said first resonator is non-tunable and said second resonator is tunable and comprises a ferroelectric substrate (21). Said first and second resonators are separated by a ground plane (13) which is common for said first and second resonators, and coupling means are provided for providing coupling between said first and second resonators. For tuning of the resonator apparatus, the biasing voltage / electric field is applied to the second resonator (2).

Description

technical field [0001] The invention relates to an adjustable resonant device comprising a resonator device. Electromagnetic energy is coupled in / out of the resonator device via input / output coupling means for tuning the resonator device, and there is a tuning means for applying a bias / tuning voltage (electric field) to the resonator device. The invention also relates to such a resonator device, a tunable filter device and a method of tuning a resonant device. Background technique [0002] Electrically tunable resonators are attractive components for portable radar and mobile wireless communication systems. Different types of resonators are known. Insulating parallel plate resonators and filters for microwave frequencies using insulating disks of any shape, such as circular, can be obtained, for example, by Vendik et al., Electronics Letters vol. 31, p. 654, 1995, incorporated herein by reference. learn. [0003] Parallel plate resonators comprising substrates made of no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P1/20H01P7/10
CPCH01P1/20H01P7/10H01P1/203
Inventor S·格沃尔吉安A·德伦尼夫O·文蒂克E·科尔贝里E·维克博里
Owner TELEFON AB LM ERICSSON (PUBL)