Modified Ring Power Divider Using Stepped-Impedance Resonator

Abstract

In this paper, the design of a modified ring power divider dedicated for wideband communication or measurement systems is presented. The proposed power divider is built by using a conventional ring power divider and an additional Stepped-Impedance Resonator (SIR). The even-odd mode analysis is used to derive the design equations. In order to observe the bandwidth improvement, a comparative study between the designed device and the previously reported ring power divider is conducted. The electromagnetic (EM) simulated results show that the proposed divider has a fractional bandwidth of 90.2 % at the center frequency of 3.17 GHz. The measurement results of the fabricated prototype demonstrate high performance over the considered operational bandwidth from 1.7 GHz to 4.64 GHz with a return loss lower than -10 dB while maintaining a good insertion loss and a good isolation between the output ports. The maximum amplitude imbalance is better than 0.21 dB and the phase imbalance is better than 2.5 degrees between the output signals. The simulation and measurement results are in good agreement over the whole band of interest.

Size reduction and performance improvement of a microstrip Wilkinson power divider using a hybrid design technique

“…The frequency response of this divider was wideband with a filtering shape, but the size reduction was not achieved. Moreover, stepped impedance resonators to improve the performances of the dividers were applied 23 , 24 and a dual-band filtering divider was introduced in 23 . In the presented divider in 21 , the stepped impedance resonators were applied to provide filtering response in operating frequencies, but the overall size of the divider was quietly large.…”

“…In the presented divider in 21 , the stepped impedance resonators were applied to provide filtering response in operating frequencies, but the overall size of the divider was quietly large. In addition, the stepped impedance resonators for harmonic suppression in WPD were utilized in 24 . However, the obtained suppressing bandwidth was narrow and the designed WPD had a large size.…”

A Hybrid Design Technique to Improve the Structure and Performance of Microstrip Components

“…Stepped impedance resonators are also used for improving the performances of the dividers [23,24]. A dualband filtering divider is presented in [23].…”

“…The Stepped impedance resonators are used in this divider to provide filtering response in both operating frequencies, but the overall size of the divider is quietly large. Stepped impedance resonators are applied in [24] for harmonic suppression in WPD. However, the obtained suppressing bandwidth is narrow and the designed WPD has a large size.…”