A Proof of Concept Balanced Mixer with the use of a Digital IF Power Combiner to Improve LO Noise Rejection

IF 3.3 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of the Pacific Pub Date : 2023-12-01 DOI:10.1088/1538-3873/ad0789

D. Monasterio, Sebastian Jorquera, F. Curotto, Camilo Espinoza, R. Finger, L. Bronfman

引用次数: 0

Abstract

In this work we present a novel digital technique, that allows local oscillator (LO) noise cancellation using a digital power combiner in a balanced mixer receiver architecture. A theoretical analysis of the noise cancellation using the proposed technique is derived and a proof of concept experiment is made for the Ku-Band. This experiment includes the design and construction of a custom balanced mixer and an artificial noise source. Experimental results show a consistent noise temperature reduction in comparison with a full analog mixer, and in some cases reaching noise temperature levels similar to the receiver operating without the artificial LO noise.

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利用数字中频功率合路器改进 LO 噪声抑制的概念验证平衡混频器

在这项工作中，我们提出了一种新的数字技术，该技术允许在平衡混频器接收器架构中使用数字功率合成器来消除本振(LO)噪声。对所提出的降噪技术进行了理论分析，并对ku波段进行了概念验证实验。本实验包括定制平衡混频器和人工噪声源的设计和构造。实验结果表明，与全模拟混频器相比，噪声温度降低一致，并且在某些情况下达到与没有人工LO噪声的接收器工作相似的噪声温度水平。

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

Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理

CiteScore

6.70

自引率

5.70%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.