Analysis of Hammerhead Probes in a Rectangular Waveguide

Authors

  • Kim Ho Yeap Department of Electronic Engineering, Tunku Abdul Rahman University, Jalan Universiti, Bandar Barat, 31900 Kampar Perak, Malaysia.
  • Zhi Ying Goh Faculty of Engineering and Green Technology, Tunku Abdul Rahman University, Jalan Universiti, Bandar Barat, 31900 Kampar Perak, Malaysia.
  • Koon Chun Lai Centre for Environment and Green Technology, Tunku Abdul Rahman University, Jalan Universiti, Bandar Barat, 31900 Kampar Perak, Malaysia.
  • Humaira Nisar Centre for Healthcare Science and Technology, Tunku Abdul Rahman University, Jalan Universiti, Bandar Barat, 31900 Kampar Perak, Malaysia.
  • Peh Chiong Teh Centre for Photonics and Advanced Material Research, Tunku Abdul Rahman University, Jalan Universiti, Bandar Barat, 31900 Kampar Perak, Malaysia.
  • Zairi Ismael Rizman Faculty of Electrical Engineering, Universiti Teknologi MARA, Terengganu Branch, Dungun Campus, 23000 Dungun, Terengganu, Malaysia.

Keywords:

Bandwidth, Coaxial Cable, Coupling Efficiency, Hammerhead Probe, Rectangular Waveguide, Return Loss,

Abstract

We present the analysis of hammerhead probes with different geometrical sizes in a rectangular waveguide. In order to investigate coupling efficiency, we vary the widths and thicknesses of the head and its handle. The results show that the probe gives higher return loss when the widths of the structure are relatively smaller, i.e. the head is of the same size and the handle is smaller than the core of the coaxial cable. Experimental measurements show that the impedance of the probe increases in corresponds to the width of the head. The poor performance found in the probe with a larger size can therefore be attributed to the impedance mismatch between the probe and the cable. It can also be observed that the probe with a thicker head and thinner handle exhibits the highest return loss and largest bandwidth. Indeed, by carefully adjusting the geometry of the hammerhead probe, the coupling efficiency is found to be better than conventional rectangular microstrip and coaxial probes. The thick head hammerhead probe gives about 22.72 dB and 31.36 dB higher peak return loss than those of the rectangular microstrip and coaxial probes. Although the bandwidths of the thick head hammerhead probe and the rectangular microstrip probe are similar, i.e. approximately 22.18 GHz, its bandwidth is about 5.88 GHz wider than the conventional coaxial probe.

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Published

2018-01-29

How to Cite

Yeap, K. H., Goh, Z. Y., Lai, K. C., Nisar, H., Teh, P. C., & Rizman, Z. I. (2018). Analysis of Hammerhead Probes in a Rectangular Waveguide. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 10(1-4), 115–118. Retrieved from https://jtec.utem.edu.my/jtec/article/view/3602

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