Power Divider/Combiner using Half-Mode Substrate Integrated Waveguide (HMSIW) Technology with High Power and High Isolation

ABSTRACT

A power divider/combiner using half-mode substrate integrated waveguide (HMSIW) and microstrip transmission lines with high isolation for high-power applications is presented. The design consists of a planar cavity, two 90° microstrip transmission lines, two matched loads, and one 180° microstrip transmission line. The cavity is fabricated using HMSIW structure and excited the TE₁₀₁ mode at the centre frequency of 4.875 GHz. The external microstrip transmission lines and matched loads are added to improve the isolation between output ports. Moreover, the matched loads prevent the appeared heat loss in the substrate. The circuit behaviour is analysed based on the even and odd mode techniques, and the structure is simulated using a 3D EM simulator. The design is fabricated on a single-layer Rogers RO4003C, and a good agreement between the results of the simulation and measurement is observed. The measured results show that the proposed structure has the insertion loss of $0.95\pm 0.05$ dB, and the isolation and output return loss better than 21.6 and 13.7 dB, respectively, when the return loss of the input port is better than 15 dB (4.8–4.95 GHz). This design has many advantages, such as low cost, low insertion loss, good return loss, good channels isolation, low profile, and compatibility with planar circuits.

KEYWORDS:

• Half-mode substrate integrated waveguide (HMSIW)
• High isolation
• High power
• Power combiner
• Power divider
• Substrate integrated waveguide (SIW)

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Ali-Reza Moznebi

Ali-Reza Moznebi was born in Sirjan, Iran, in 1990. He received the BS degree in electrical engineering from O. T. F. University, Fars, Iran, in 2013, and the MS degree in electrical engineering from the Shahid Bahonar University of Kerman, Kerman, Iran, in 2016. He is currently working toward the PhD degree in Electrical Engineering at Shahid Bahonar University of Kerman. His research interests include microwave/millimetre-wave power-dividing technology and microwave/millimetre-wave devices, circuits, and systems.

E-mail: [email protected]

Kambiz Afrooz

Kambiz Afrooz was born in Baft, Iran, in 1983. He received the BSc degree from the Shahid Bahonar University of Kerman, Kerman, Iran, in 2005, the MSc and PhD degrees from the Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran, in 2007 and 2012, respectively, all in electrical engineering. In May 2011, he joined the CIMITEC group, University Autonoma de Barcelona (UAB), Barcelona, Spain, as a visiting student. He is currently an associate professor with the Electrical Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran. His research interests are in the areas of computer-aided design of active and passive microwave devices and circuits, computational electromagnetic, modelling and simulation of high-speed interconnects, metamaterial transmission lines, and substrate integrated waveguide structures. He is also the recipient of the Electrical Engineering Department Outstanding Student Award in 2007.

E-mail: [email protected]