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Radio frequency antenna matching design circuit

A technology for designing circuits and radio frequency antennas, applied in the field of antenna circuits, can solve problems affecting wireless terminals, inconsistency, and increase design costs, so as to achieve the effect of reducing costs and quickly responding to market demand

Inactive Publication Date: 2013-05-08
CHENGDU HI TECH ZONE NIMA ELECTRONICS PROD DESIGN STUDIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach also results in a narrower antenna bandwidth
[0006] 2. Add inductive grounding to the capacitive planar antenna to reduce the resonant frequency of the antenna
Designing the PF antenna circuit and the patch antenna circuit separately will often increase the design cost and production cost, and will also affect the inconsistency of the wireless terminal

Method used

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  • Radio frequency antenna matching design circuit

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Effect test

Embodiment 1

[0034] Such as figure 1 shown.

[0035] The antenna matching design circuit is mainly composed of an antenna signal input matching circuit, a patch antenna matching circuit and a radio frequency choke circuit connected to the antenna signal input matching circuit at the same time, the radio frequency choke circuit is connected with a PF antenna matching circuit, and the The PF antenna matching circuit is connected with the patch antenna matching circuit.

[0036] The antenna signal input matching circuit is mainly composed of an antenna signal input ANT, an inductor L13, a capacitor C26, and an inductor L8 connected in series in sequence. Both ends of the inductor L13 are connected with capacitors C23 and C25 connected in parallel to the ground, and the capacitor C26 is close to the inductor L8. One end is connected with patch antenna matching circuit and radio frequency choke circuit.

[0037] The radio frequency choke circuit is mainly composed of a grounded radio frequenc...

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Abstract

The invention discloses a radio frequency antenna matching design circuit which is mainly composed of an antenna signal input matching circuit, a patch antenna matching circuit and a radio frequency choke circuit. The patch antenna matching circuit and the radio frequency choke circuit are connected with the antenna signal input matching circuit, and the radio frequency choke circuit is connected with a pulse frequency (PF) antenna matching circuit which is connected with the patch antenna matching circuit. The radio frequency antenna matching design circuit has the advantages that the printed circuit board (PCB) design does not need changing, and the PCB surely can compatible to two antenna designs so as to conveniently and quickly respond to market requirements. Every antenna has an independent matching circuit, and the independent matching circuits do no interfere to each other. The radio frequency antenna matching design circuit is designed in a jumper mode, and a large power switch is removed. Bill of materials (BOM) cost is reduced.

Description

technical field [0001] The invention relates to an antenna circuit, in particular to a radio frequency antenna matching design circuit. Background technique [0002] The antenna is made of metal wires, metal surfaces or other dielectric materials to form a certain shape, erected in a certain space, and converts the radio frequency power fed from the transmitter into electromagnetic wave energy radiated into space, or converts the electromagnetic wave energy propagated in space into radio frequency power and delivered to the receiver device. [0003] There are many types of antennas. In wireless terminals, especially miniaturized wireless terminals, patch antennas or PF antennas are generally used. [0004] For PF antennas, as antennas are gradually built into portable devices, a large number of planar built-in antennas are used. In order to reduce the size of the antenna, there are usually the following two methods. [0005] 1. Use a dielectric board with a high dielectric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B1/18
Inventor 黄友华
Owner CHENGDU HI TECH ZONE NIMA ELECTRONICS PROD DESIGN STUDIO
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