Microstrip line Butler matrix provided with bandpass filtering characteristic and based on stub-loaded resonators

A Butler matrix and bandpass filtering technology, applied in the field of microstrip line Butler matrix, can solve the problems of circuit size increase, etc., and achieve the effects of circuit size reduction, easy design, and good isolation

Inactive Publication Date: 2016-08-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology uses a special type called a compound filter that can be used more efficiently than traditional filters like inductors or capacitors. It achieves this by combining two different types of components - an electric component made up from coils wires suspended between them while another part consists mostly of iron powder inside it's own core material. By doing these things together, there are no longer any moving parts needed anymore, making the device lighterweight without sacrificing its performance. Additionally, due to their small dimensions, they have improved signal quality compared to previous designs. Overall, this innovative solution simplifies the construction process and improves overall efficiency over existing technologies

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the efficiency and effectiveness of radio waves used in mobile devices (such as cell phones). Specifically, current methods involve adding extra components like filters to reduce unwanted signals from transmitting over multiple paths simultaneously. However, there may still exist issues where certain frequencies cannot meet desired standards due to their overlap. To address those concerns, new techniques called "Beam Switched Smart Antennas," including butteryphone matrices, waveguide networks, and hybrid circuits, were developed. These improvements aim to improve both high data rate capabilities and minimizing distortion caused by electromagnetic noise.

Method used

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  • Microstrip line Butler matrix provided with bandpass filtering characteristic and based on stub-loaded resonators
  • Microstrip line Butler matrix provided with bandpass filtering characteristic and based on stub-loaded resonators
  • Microstrip line Butler matrix provided with bandpass filtering characteristic and based on stub-loaded resonators

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Embodiment

[0036] This embodiment discloses a microstrip line Butler matrix with bandpass filtering characteristics based on stub-loaded resonators such as figure 1 As shown, the microstrip line Butler matrix is ​​fabricated on a double-sided copper-clad microstrip board 1 in the form of a printed circuit board, and the other side of the microstrip board is a copper-clad ground plane. In the structure diagram of the Butler matrix in the present invention.

[0037]The first input terminal feeder P1 and the second input terminal P2 for inputting electromagnetic wave signals, the first output terminal feeder P3 and the second output terminal for outputting electromagnetic wave signals are respectively fabricated on the same surface of the dielectric substrate. The feeder head P4, the first port feeder 2 connected to the first input end feeder P1, the second port feeder 5 connected to the second input end feeder P2, the first output end feeder P3 The connected third port feeder 3, the fourth p

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Abstract

The invention discloses a microstrip line Butler matrix provided with a bandpass filtering characteristic and based on stub-loaded resonators. The microstrip line Butler matrix comprises four stub-loaded resonators, two input end feed line heads, two output end feed line heads and four port feed lines. Each resonator is electrically or magnetically coupled with another two resonators, and a phase shift characteristic is realized by means of the combination of electric coupling and magnetic coupling paths. According to the invention, 3dB couplers are replaced by the stub-loaded resonators, the structure is simple, and the bandpass filtering characteristic is realized; the phase shift characteristic is realized by means of the combination of electric coupling and magnetic coupling paths, a phase shifter is omitted, a relatively good isolation degree is ensured, and the size of the circuit is substantially reduced; in addition, the Butler matrix is of the microstrip structure, the weight is light, the cost is low, the industrial batch production is facilitated, and the Butler matrix has the advantages of simple structure, easy design and low manufacturing cost.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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