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Elliptic function type low-pass filter and radio frequency device

A technology of low-pass filter and elliptic function, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as inconvenient operation and difficult tuning, and achieve the effects of avoiding short circuit, less processing difficulty and good effect

Active Publication Date: 2020-06-02
COMBA TELECOM TECH (GUANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some existing technologies still have problems such as difficult tuning or inconvenient operation, system isolation, etc.

Method used

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  • Elliptic function type low-pass filter and radio frequency device
  • Elliptic function type low-pass filter and radio frequency device
  • Elliptic function type low-pass filter and radio frequency device

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Embodiment Construction

[0028] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. In order to facilitate the practical application of the described a kind of elliptic function type low-pass filter, the following embodiments will introduce the specific components of the elliptic function type low-pass filter, so that the application and connection of the elliptic function type low-pass filter It is worth noting that the protection scope of the present invention is not limited.

[0029] Please refer to figure 1 , figure 1 An embodiment of the present invention—an elliptic function type low-pass filter 1 (hereinafter simply referred to as filter 1 ) is shown. The filter 1 includes a cavity 11, and two ports 111 for external signal connection are provide...

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Abstract

The invention provides an elliptic function type low pass filter. The elliptic function type low pass filter includes a cavity. The cavity is provided with two ports used for external signal connection at the lengthwise two ends. The cavity is therein provided with an inner conductor used for signal conduction between the two ports. The inner conductor is provided with a plurality of resonance units in the lengthwise direction in a spaced manner. At least one end of the inner conductor is connected with a lumped parameter harmonic oscillator in parallel at a position adjacent to the corresponding port. The invention also provides a radio frequency device adopting the elliptic function type low pass filter. The elliptic function type low pass filter and the radio frequency device are smallin insertion loss, small in standing-wave ratio, high in near-end out-of-band rejection, wide in rejection frequency band and can be applied to a system having high requirements for isolation. The elliptic function type low pass filter and the radio frequency device can also realize tuning of the inner part on the outer surface of a cover board, so that repeated opening and closing of the cover board is avoided.

Description

technical field [0001] The invention mainly relates to the field of mobile communication, in particular to an elliptic function type low-pass filter and a radio frequency device, and the elliptic function type low-pass filter can improve out-of-band suppression. Background technique [0002] At present, in modern mobile communication technology, low-pass filter is an essential and important part. Common low-pass filters are divided into two types: Chebyshev type and elliptic function type. The former has the obvious disadvantages of slow out-of-band drop and low out-of-band rejection, and the filtering performance depends on processing and assembly accuracy. This type of Chebyshev filter is generally used to suppress the far-end out-of-band, which cannot meet the ultra-high rejection requirements between systems. The latter has small size, wide passband bandwidth, low in-band insertion loss, ultra-high out-of-band rejection, and is easy to process and produce in batches. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/208
CPCH01P1/208
Inventor 金志刚丁海黄友胜靳雲玺
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD
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