Unlock instant, AI-driven research and patent intelligence for your innovation.

Bandpass filter

A band-pass filter and half-wave technology, which is applied in the direction of waveguide devices, electrical components, radio/inductive link selection and arrangement, etc., can solve the problems of difficult manufacture of band-pass filters and high cost of band-pass filters

Inactive Publication Date: 2005-08-17
TDK CORPARATION
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So this makes the above bandpass filter very difficult to manufacture
So the cost of the bandpass filter is higher

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bandpass filter
  • Bandpass filter
  • Bandpass filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The preferred embodiment of the present invention will now be explained with reference to the drawings.

[0056] Such as Figure 1-3 As shown, the bandpass filter 1 belonging to a preferred embodiment of the present invention is composed of a first resonator 2, a second resonator 3, and a vanishing type between the first and second resonators 2 and 3. The waveguide 4 is constituted.

[0057] The first resonator 2 and the second resonator 3 are symmetrical. Each is composed of a dielectric block, the length, width and thickness of the dielectric block are 1.3 mm, 5.1 mm, and 1.0 mm. These dielectric blocks are made of a dielectric material with a dielectric constant εr=37. The vanishing waveguide 4 is composed of a dielectric block, and the length, width, and thickness of the dielectric block are 0.2 mm, 5.1 mm, and 1.0 mm. It is composed of the same dielectric material as the dielectric blocks constituting the first and second resonators 2 and 3. Therefore, the length, widt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A highly compact and easily fabricated band pass filter is disclosed. A band pass filter according to the present invention employs a first half-wave (lambda / 2) resonator having a first open end on which an input terminal is formed and a second open end opposite to the first open end, a second half-wave (lambda / 2) resonator having a third open end on which an output terminal is formed and a fourth open end opposite to the third open end, and an evanescent waveguide interposed between the second open end of the first resonator and the fourth open end of the second resonator. The first half-wave (lambda / 2) resonator, the second half-wave (lambda / 2) resonator, and the evanescent waveguide being single-unit. An air gap does not have to be formed by mounting components on a printed circuit board. Therefore, the overall size of the band pass filter can be miniaturized and fabrication of the band pass filter is simplified.

Description

Technical field [0001] The present invention relates to a band pass filter, and more particularly to a band pass filter that is very compact and easy to manufacture. Background technique [0002] In recent years, communication terminals represented by mobile phones have made remarkable progress in miniaturization due to the miniaturization of various components used therein. One of the most important components used in communication terminals is a bandpass filter. [0003] Such as "a novel TE 10δ Rectangular waveguide resonator and its bandpass filter application (Korea-Japan Microwave Symposium 2000 Conference Proceedings, September 2000), as pointed out in p88, Fig.8″, this kind of bandpass filter is known, among which A plurality of TE mode half-wave (λ / 2) dielectric resonators are arranged on the printed circuit board at predetermined intervals. In the band pass filter described in this article, the distance (air gap) between the resonators serves as a so-called The vanishing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203H01P1/201H01P1/205H01P1/208
CPCH01P1/2084H01P1/201
Inventor 薰树亚栏
Owner TDK CORPARATION