Wideband Non-Reciprocal Magnetic-Free Devices Based on High-Order Spatio-Temporal Modulation

Abstract

In this paper, we demonstrate that wideband nonreciprocal magnetic-free devices with flat and low loss in-band transmission, high isolation, and good matching at each ports, can be obtained by using higher-order spatio-temporal modulation(STM). As a proof-of-concept, a 3-pole filtering isolator at200MHz and a 2-pole circulator at 450MHz are designed and tested. The filtering isolator demonstrates an insertion loss of1.5 dB with a suppressed reverse isolation better than 20 dB across the frequency range of 170203 MHz. The circulator shows an insertion loss of 3.8 dB with a reverse isolation better than15 dB across the frequency range of 400470 MHz.

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Document Details

Document Type
Technical Report
Publication Date
Mar 25, 2019
Accession Number
AD1075475

Entities

People

  • Mahmoud Nafe
  • Xiaoguang Liu
  • Xiaohu Wu

Organizations

  • University of California, Davis

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angular Momentum
  • Bandpass Filters
  • Bandwidth
  • Capacitance
  • Capacitors
  • Ferromagnetic Materials
  • Filters
  • Filtration
  • Frequency
  • Insertion Loss
  • Losses
  • Low Pass Filters
  • Magnetic Fields
  • Modulation
  • Phase Shift
  • Resonant Frequency
  • Resonators

Readers

  • Microwave Engineering.
  • Optical Physics and Photonics.