Millimeter-Wave Substrate Integrated Corrugation Loaded H-Plane Horn Antenna with Beamwidth and Back Radiation Suppression

Weiguang Song, Zhenxiang Yi, Lei Wang

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This paper presents a wideband substrate integrated H-plane horn antenna loaded with a novel E-plane corrugation. Classical SIW H-plane horn antennas suffer from poor impedance matching, large E-plane half-power beamwidth and strong back radiation due to the thinness of the substrates. A substrate integrated E-plane corrugation is introduced as an effective solution, implemented using the multi-layer printed circuit board (PCB) technique. The elaborated corrugated SIW horn is well matched with reflection coefficients less than − 10 dB from 26 to 40 GHz. The back radiation suppression reflected by front-to-back ratios is improved to minimum 20 dB and up to 40 dB in the entire Ka-band. Furthermore, the corrugation reduces the half-power beamwidth of the E-plane radiation patterns successfully, e.g. from 180 ∘ to 80 ∘ at 30 GHz, whereas the H-plane patterns are maintained and unaffected. Consequently, the antenna gain is well enhanced. A prototype of the corrugated horn is fabricated and then measured. The measurement is in good agreement with the simulation. The proposed corrugated SIW horn antenna is compact in a planar structure so as to easy integration and array deployment. The wide bandwidth, narrow E-plane half-power beamwidth and low back radiation make it very promising for applications as millimeter-wave probes or handset antennas.
Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Publication statusE-pub ahead of print - 26 Jun 2023


  • Antenna measurements
  • Antenna radiation patterns
  • Corrugated horn
  • E-plane corrugation
  • Gain
  • H-plane horn
  • Horn antennas
  • Loaded antennas
  • Metals
  • Substrates
  • front-to-back ratio (FTBR)
  • substrate integrated waveguide (SIW)
  • wideband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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