Design of High-Performance Miniaturized Circular Slotted Power Rings

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Abstract

This manuscript presents the design, evaluation, analysis, and fabrication of centre-fed circular slotted power dividers (CSPDs) with enhanced performance and miniaturization. The proposed design methodology introduces one or more annular slotted rings into the structure, enabling significant improvements in terms of patch area reduction (60% to 80%) and usable bandwidth increase (by a factor of 2-3).

Introduction

The increasing demand for compact and efficient power dividers has led to numerous research efforts to miniaturize and enhance their performance. This paper focuses on the design and development of high-performance, miniaturized circular slotted power dividers (CSPDs) that offer significant improvements over conventional centre-fed circular power dividers.

Device Structure

The proposed CSPD structure consists of a central micro-strip segment (CMSS) surrounded by an annular portion (AMSS), as shown in Figure 2A and 2B. The CMSS is fed through a coaxial connector, while the AMSS distributes power to the output ports.

Method of Analysis

The CSPD structure is divided into two separate components: the Central Micro-Strip Structure (CMSS) and Annular Micro-Strip Structure (AMSS). The initial stage of analysis focuses on the CMSS, which includes a solitary circular segment. The subsequent stage analyzes the AMSS, taking into account the power dividing arms and fringing fields surrounding the circular segment.

Results and Discussion

Using the fundamental framework for design procedure established in Section III, a computer code has been developed to calculate the design parameters of the CSPDs for given substrate and frequency of operation. A comprehensive parametric analysis is performed to examine the impact of varying various parameters such as frequency, substrate permittivity, and substrate thickness.

Hardware Fabrication and Testing

For the purpose of illustrating the design technique, two independent frequencies were selected and the CSPD was designed at both frequencies using the mathematical design procedure outlined in Section III. The designed power divider was then simulated and fabricated on an FR4 substrate with a permittivity of 4.0, loss tangent of 0.01, and substrate thickness of 1.2 mm.

The designs presented in this manuscript evince that the Circular Slotted Power Divider (CSPD) holds significant potential for power division applications. The proposed design method for the CSPD presented in the paper is validated through simulation and experimentation with reasonable agreement. The proposed CSPD shows overall improvement in its performance as compared to conventional CPD, especially the patch area is reduced by 60% to 80% and usable bandwidth is increased by a factor of 2-3.

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

References

Miniaturized Gysel power divider with nth harmonics suppression, AEU Int J Electron Commun (2018)
Adrian Bekasiewicz and Slawomir Koziel “EM-driven topology evolution for bandwidth enhancement of hybrid quadrature…
Shao Yong Zheng “A compact patch quadrature coupler with enhanced bandwidth and harmonic suppression” presented at the…
D. Abouzahra, Mohamed et al., “Multiple-port power divider / combiner circuits using circular microstrip disk configurations,” IEEE Trans Microw Theory Tech (1987)
M.D. Abouzahra et al., Multiport power divider-combiner circuits using circular-sector-shaped planar components, IEEE Transactions on Microwave Theory and Techniques, Dec (1988)
Qiyun Zhang et al., “Dual-Band filtering power divider based on a single circular patch resonator with Improved bandwidths and good isolation,” IEEE Trans Circuits Systems I Fund Theory Appl (2021)
Bingjie Xiang and Shaoyong Zheng, “Bandpass filtering 180° patch coupler with wide suppression band,” presented at the…
Girish Kumar K.P. Ray “Regularly shaped broadband MSAs” in Broadband Microstrip Antennas 1st ed., Boston London:…
N. Kumprasert et al., ‘Simple and accurate formula for the resonant frequency of the circular microstrip disk antenna,’ IEEE Trans Antennas Propag (1995)
I. Wolff et al., ‘Rectangular and circular microstrip disk capacitors and resonators,’ IEEE Trans Microw Theory Tech (1974)
K.P. Ray et al., “Determination of the resonant frequency of microstrip antennas,” Microwave Optical Technology Letters (1999)
R. Garg et al., “circular Disk and Ring Antennas”, in Microstrip Antenna Design Handbook (2001)

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