A Broadband Doherty-Like Load-Modulated Balanced Amplifier With an Optimized Impedance Transformation Ratio in InGaP/GaAs HBT Process for Handset Applications

IF 3.4 0 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI:10.1109/LMWT.2025.3560289

Byeongcheol Yoon;Sooji Bae;Seungju Lee;Sungwoon Hwang;Jooyoung Jeon;Junghyun Kim

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引用次数: 0

Abstract

This letter presents a design methodology for implementing broadband load-modulated balanced amplifier (LMBA) for handset applications. It is evaluated which architecture, Doherty-like LMBA (DL-LMBA) or pseudo-Doherty LMBA (PD-LMBA), is more suitable for InGaP/GaAs HBT power amplifier (PA). The impedance transformation ratio (ITR) is optimized through an analysis of correlation between the coupler impedance (

$Z_{0}$

) and matching network (MN). A prototype LMBA attains measured saturation power (

$P_{\text {SAT}}$

), collector efficiency (CE), and 6-dB output power back-off (OBO) CE of over 33.2 dBm, 45.2%, and 42.0%, respectively, in the range of 3.2–5.0 GHz. The LMBA is also evaluated by 5G NR FR1 100-MHz QPSK CP-OFDM with 9.5-dB peak-to-average power ratio (PAPR), achieving 26.6-dBm average output power (

$P_{\text {avg}}$

) with 37.7% average CE (CE_avg) at an adjacent channel leakage ratio (ACLR) of −33 dBc.

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手机用InGaP/GaAs HBT工艺中阻抗转换比优化的宽带类doherty负载调制平衡放大器

这封信提出了实现宽带负载调制平衡放大器（LMBA）的手机应用的设计方法。并对仿doherty LMBA （DL-LMBA）和伪doherty LMBA （PD-LMBA）哪种架构更适合InGaP/GaAs HBT功率放大器（PA）进行了评价。通过分析耦合器阻抗（$Z_{0}$）与匹配网络（MN）之间的相关性，优化阻抗转换比（ITR）。在3.2-5.0 GHz范围内，LMBA样机的饱和功率（$P_{\text {SAT}}$）、集电极效率（CE）和6db输出回退功率（OBO） CE分别超过33.2 dBm、45.2%和42.0%。LMBA还通过具有9.5 db峰均功率比（PAPR）的5G NR FR1 100 mhz QPSK CP-OFDM进行了评估，在相邻信道泄漏比（ACLR）为- 33 dBc的情况下，平均输出功率（$P_{\text {avg}}$）为26.6 dbm，平均CE （CEavg）为37.7%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE microwave and wireless technology letters

CiteScore

6.00

自引率

0.00%

发文量