A dual-polarized cavity-back radiator

By combining a multi-ring reflector cavity and an orthogonal printed composite oscillator, the problems of pattern distortion and high loss in traditional dual-line baluns above 5 GHz are solved, enabling the application of low-cost, low-loss dual-polarized back cavity radiators suitable for electronic devices above 5 GHz.

CN122370700APending Publication Date: 2026-07-10SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Patent Information

Application Number
CN202610645180.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-12
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional orthogonal short-circuit dual-wire baluns exhibit strong jumper inductance effects and large dual-wire radiation above 5GHz, leading to severe pattern distortion. Planar orthogonal differential feed networks suffer from high network losses and manufacturing costs, making them unsuitable for widespread application in electronic devices above 5GHz.

Method used

A multi-ring choke structure is adopted to replace the small-diameter single-cavity structure of the traditional broadband back cavity radiator. Combined with orthogonal printed composite oscillators and butterfly oscillator plates, balun feeding is achieved through a single printed circuit board. The dual-line balun, impedance compensation line and open-circuit compensation section are integrated to reduce back energy leakage, expand impedance bandwidth, suppress low-end sidelobes in the frequency band, and improve gain and pattern equalization.

Benefits of technology

It achieves effective radiation of low-frequency energy, expands the effective radiation range of electromagnetic waves, reduces network loss and manufacturing costs, and is suitable for widespread application in electronic devices above 5GHz. It solves the problems of pattern distortion and high loss, and realizes a miniaturized and low-cost dual-polarized cavity radiator.

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Abstract

This invention relates to the field of electromagnetic fields and microwave technology, aiming to solve the problems of traditional orthogonal short-circuit dual-wire baluns, which suffer from strong jumper inductance effects, large dual-wire radiation, and severe pattern distortion above 5GHz. The planar orthogonal differential feed network also suffers from high network losses and manufacturing costs, making it unsuitable for widespread use in electronic devices above 5GHz. The invention provides a dual-polarized back-cavity radiator, including a reflective cavity enclosure component forming an inner reflective cavity and a ring reflective cavity. An orthogonal printed composite oscillator is disposed within the inner reflective cavity, comprising horizontal and vertical printed composite oscillators, with oscillator plates connected to both sides of each oscillator. Each printed composite oscillator integrates a dual-wire balun, impedance compensation lines, and open-circuit compensation sections. Each printed composite oscillator includes a printed oscillator with front, back, and mezzanine circuits. The impedance compensation lines and open-circuit compensation sections are embedded within the printed oscillator and connected to the mezzanine circuits. The dual-wire balun includes parallel dual wires connected to the front and back circuits.
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