# Design of a Compact UHF Wilkinson Power Divider Using a Combined T-Shaped–CCMRC Resonator for Harmonic Suppression

## TL;DR

This paper presents a compact UHF power divider with improved harmonic suppression using a novel resonator design for wireless communication systems.

## Contribution

A new combined T-shaped–CCMRC resonator is introduced for compact UHF power dividers with wideband harmonic suppression.

## Key findings

- The divider achieves a return loss better than 39 dB and output-port isolation higher than 47 dB at 570 MHz.
- A wide stopband from 1.5 GHz to 3.5 GHz provides strong attenuation for third-to-sixth harmonics.
- The design is 76% smaller than conventional dividers at the same frequency.

## Abstract

This paper proposes a compact UHF microstrip divider with wideband harmonic suppression. A combined resonator, formed by a T-shaped resonator and a pair of coupled compact microstrip resonant cells (CCMRCs), is embedded into each divider branch to replace the conventional quarter-wavelength transmission lines. The divider is designed on an FR4 substrate (εr = 4.4, thickness = 60 mil) for a center frequency of 570 MHz. Full-wave electromagnetic simulations indicate equal power division at 570 MHz with return loss better than 39 dB and output-port isolation higher than 47 dB. Moreover, a wide stopband from 1.5 GHz to 3.5 GHz is obtained, yielding strong attenuation for the third-to-sixth harmonics. The proposed layout occupies 19.6 mm × 21.6 mm, which is about 76% smaller than a conventional 570 MHz divider (42.7 mm × 41 mm). The proposed design is suitable for modern wireless communication systems.