Integrated Design of Dual-Band Power Amplifier and Circularly Polarized Antenna

YE Min; LU Yun-long; HUANG Ji-fu; SUN Li-ying

doi:10.12263/DZXB.20250064

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Integrated Design of Dual-Band Power Amplifier and Circularly Polarized Antenna

PAPERS | 更新时间：2025-12-27

- Integrated Design of Dual-Band Power Amplifier and Circularly Polarized Antenna
- ACTA ELECTRONICA SINICA Vol. 53, Issue 8, Pages: 2962-2969(2025)
- 作者机构：
  
  宁波大学信息科学与工程学院，浙江宁波 315211
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62171242);Zhejiang Provincial Natural Science Foundation(LR24F010001);Ningbo Natural Science Foundation(2024J027);Ningbo Municipal Science and Technology Innovation Yongjiang 2035 Key R&D Plan(2025Z206)
- DOI：10.12263/DZXB.20250064
  CLC： TN917;
- Received：18 January 2025，
  
  Accepted：01 July 2025，
  
  Published：25 August 2025
- 稿件说明：
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叶敏, 陆云龙, 黄季甫, 等. 双频功率放大器与圆极化天线的直接集成设计[J]. 电子学报, 2025, 53(08): 2962-2969.

YE Min, LU Yun-long, HUANG Ji-fu, et al. Integrated Design of Dual-Band Power Amplifier and Circularly Polarized Antenna[J]. Acta Electronica Sinica, 2025, 53(08): 2962-2969.
叶敏, 陆云龙, 黄季甫, 等. 双频功率放大器与圆极化天线的直接集成设计[J]. 电子学报, 2025, 53(08): 2962-2969. DOI：10.12263/DZXB.20250064

YE Min, LU Yun-long, HUANG Ji-fu, et al. Integrated Design of Dual-Band Power Amplifier and Circularly Polarized Antenna[J]. Acta Electronica Sinica, 2025, 53(08): 2962-2969. DOI：10.12263/DZXB.20250064

摘要

本文介绍了一种高效率双频段圆极化缝隙耦合天线与氮化镓（Gallium Nitride，GaN）功率放大器（Power Amplifier，PA）的直接集成方案.通过电磁-电路协同优化，使天线输入阻抗在双频点直接与PA漏极输出的最佳负载阻抗匹配，消除传统PA输出匹配网络的插入损耗和失配损耗，在维持天线辐射性能稳定的同时有效提升系统效率.双频圆极化天线采用“I”型缝隙激励旋转式辐射贴片实现圆极化波辐射，同时可以调控天线输入阻抗特性.为验证设计的有效性，加工了工作在2.6 GHz和3.5 GHz的双频功率放大器集成天线（Power Amplifier Integrated Antenna，PAIA），并在微波暗室中进行了实验测试.测量结果表明，3 dB轴比（Axial Ratio，AR）带宽与阻抗带宽的重叠区域分别为200 MHz和300 MHz，中心频点处等效全向辐射功率（Effective Isotropic Radiated Power，EIRP）分别达到46 dBm和48.2 dBm，饱和功率附加效率（Power Added Efficiency，PAE）分别超过67%和71%，呈现出优异的整体效率和稳定的圆极化辐射特性.

Abstract

This paper presents a highly efficient dual-band circularly polarized slot-coupled antenna directly integrated with a gallium nitride (GaN) power amplifier (PA). Through electromagnetic-circuit co-optimization

the antenna input impedance is directly matched to the optimal load impedance of the PA drain output at dual frequencies

eliminating the insertion loss and mismatch loss of traditional PA output matching networks. This approach effectively enhances system efficiency while maintaining stable antenna radiation performance. The dual-band circularly polarized antenna employs an “I”-shaped slot to excite a rotating radiation patch

enabling circularly polarized wave radiation while simultaneously regulating the antenna input impedance characteristics. To validate the design

a dual-band power amplifier integrated antenna (PAIA) operating at 2.6 GHz and 3.5 GHz was fabricated and experimentally tested in an anechoic chamber. Measurement results demonstrate that the overlapping regions of the 3 dB axial ratio (AR) bandwidth and impedance bandwidth are 200 MHz and 300 MHz

respectively. The effective isotropic radiated power (EIRP) at the center frequencies reaches 46 dBm and 48.2 dBm

while the saturated power added efficiency (PAE) exceeds 67% and 71%

respectively. These results highlight the excellent overall efficiency and stable circularly polarized radiation characteristics of the proposed design.

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references

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