Design of a low-noise wideband fixed IF subharmonic mixer at W-band

IF 1.2 4区工程技术 Q4 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Analog Integrated Circuits and Signal Processing Pub Date : 2025-03-27 DOI:10.1007/s10470-025-02388-y

Sadhana Kumari, Naveen Kumar Maurya, Gaurav Varshney

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引用次数: 0

Abstract

This paper provides an idea for designing a highly efficient, second-order broadband fixed-IF subharmonic mixer. Attention is paid to the step-by-step design process with detailed fabrication methods. With the purpose to improve the accuracy of simulation, the diode model is separated into the passive (linear) and the active (nonlinear) model. HFSS is utilized for the linear simulation of the mixer model while ADS is utilized for the non-linear simulation of the mixer. A tapered RF probe at the RF port is utilized to achieve wideband performance. The circuit of the presented mixer is printed on the 75 μm Quartz substrate and mounted in a waveguide block using split block technology. Measured results indicate an admissible conversion loss (better than 10.2 dB) over the RF bandwidth from 84 to 105 GHz. A moderate local oscillator power (9 dBm) is needed for this operation. The proposed mixer circuit is verified by test data. The measured port isolation between LO and RF is at least 36 dB. The least measured value of DSB noise temperature and conversion loss is 845 K and 7.2 dB, respectively at 85.2 GHz. The proposed Anti-parallel diode pair (APDP) based diode mixer shows better LO–RF isolation and conversion loss over other W-band mixers reported to date.

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w波段低噪声宽带固定中频次谐波混频器的设计

本文提出了一种高效的二阶宽带固定中频次谐波混频器的设计思路。注重一步一步的设计过程与详细的制造方法。为了提高仿真精度，将二极管模型分为无源（线性）模型和有源（非线性）模型。HFSS用于混合器模型的线性仿真，ADS用于混合器的非线性仿真。射频端口的锥形射频探头用于实现宽带性能。该混频器电路印刷在75 μm石英衬底上，并采用分块技术安装在波导块中。测量结果表明，在84至105 GHz的RF带宽范围内，可接受的转换损耗（优于10.2 dB）。本振功率适中（9dbm）。实验数据验证了所提出的混频器电路。LO和RF之间的端口隔离至少为36db。在85.2 GHz时，DSB噪声温度和转换损耗的最小测量值分别为845 K和7.2 dB。所提出的基于反并联二极管对（APDP）的二极管混频器比迄今为止报道的其他w波段混频器具有更好的LO-RF隔离和转换损耗。

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

Analog Integrated Circuits and Signal Processing 工程技术-工程：电子与电气

CiteScore

0.30

自引率

7.10%

发文量

141

审稿时长

7.3 months

期刊介绍： Analog Integrated Circuits and Signal Processing is an archival peer reviewed journal dedicated to the design and application of analog, radio frequency (RF), and mixed signal integrated circuits (ICs) as well as signal processing circuits and systems. It features both new research results and tutorial views and reflects the large volume of cutting-edge research activity in the worldwide field today. A partial list of topics includes analog and mixed signal interface circuits and systems; analog and RFIC design; data converters; active-RC, switched-capacitor, and continuous-time integrated filters; mixed analog/digital VLSI systems; wireless radio transceivers; clock and data recovery circuits; and high speed optoelectronic circuits and systems.