Parametric Study of Parallel Inhomogeneous Cylindrical Dielectric Resonator at C-Band Frequency
Dielectric resonator has been implemented in many frequencies and microwave front-end design, where the main focus is on homogeneous (single) permittivity that performed only one purpose at one time. In this article, the parallel inhomogeneous cylindrical dielectric resonator at C-band resonant frequency is presented. The parallel inhomogeneous cylindrical resonator modeled by combining two different dielectric permittivities; Magnesium Titanate and Cobalt Tinatane that have high and low permittivity, respectively. Each permittivity material is divided 90° apart. A parallel microstrip-line coupling is used to excite the inhomogeneous cylindrical dielectric resonator. The parametric study of the parallel inhomogeneous cylindrical dielectric resonator is highlighted to be investigated purposely to identify the impact on any changing parameter behavior and obtain their best configuration of performances. These parametric studies evaluated in-term of configuration the parallel microstrip-line and the effect of angular position inhomogeneous cylindrical dielectric resonator. Different types of configuration microstrip-line are tested, i.e. coupling spacing and curves configuration at λ/4 of wavelength. The return loss at the input port of parametric study in-terms of coupling coefficients is satisfactory at 17 and 19 (mm) of parallel microstrip-line for same-port positions. Meanwhile, the investigation into parallel microstrip-line curve configuration at λ/4 of wavelength indicates the best performance at curve configuration of 155° with 9.77% improvement on 5 GHz resonant frequency. In conclusion, the optimum performance of inhomogeneous cylindrical dielectric resonator at 5 GHz is performed when coupling distance of 19 mm with 155° curves positions of parallel microstrip-line without the angular position.
KeywordsCylindrical dielectric resonator Inhomogeneous Multi-permittivity Parallel microstrip-line Parametric study
This work was supported by Malaysia’s Ministry of Higher Education (MOHE) through Fundamental Research Grant Scheme [FRGS grant number: 203.PELECT.6071373], Universiti Malaysia Perlis (UniMAP) for Fellowship of Native Academic Teaching Scheme (SLAB), and also Universiti Sains Malaysia (USM).
- 1.Ullah, U., Ain, M.F., Othman, M., Zubir, I., Mahyuddin, M., Ahmad, Z.A., Abdullah, M.Z.: A novel multi-permittivity cylindrical dielectric resonator antenna for wideband applications. Radioengineering 23, 1071–1076 (2014)Google Scholar
- 3.Olokede, S.S., Zaki, S.B.B.M., Mahyuddin, N.M., Ain, M.F., Ahmad, Z.A.: Design of a negative conductance dielectric resonator oscillator for X band applications. Radioelektronika 60(9), 531–544 (2017)Google Scholar
- 4.Mahyuddin, N.M., Ain, M.F., Hassan, S.I.S., Singh, M.: A 10 GHz PHEMT dielectric resonator oscillator. In: Proceedings of the IEEE International RF and Microwave Conference, pp. 26–30. IEEE Explore, Putrajaya, Malaysia (2006)Google Scholar
- 7.Pozar, D.M.: Microwave Engineering, 3rd edn. Wiley, New York (2005)Google Scholar