Compact Wilkinson Power Divider With Higher Order Harmonics Suppression for Lte Application

Abstract

This paper presents a compact Wilkinson power divider (WPD) operating at 0.7 GHz (LTE band) with higher order harmonics suppression based on step impedance shunt stubs (SISSs) and defected ground structure (DGS). The quarter wavelength lines of conventional WPD are replaced by a host line loaded with a DGS and a pair of SISSs. The DGS and SISS of the proposed line serve as a high series inductance and shunt capacitance, respectively. Therefore, a compact quarter wavelength line is designed compared to conventional one. A prototype of the proposed power divider is designed based on the proposed line, which provides a size reduction of 71% as compared to conventional WPD (CWPD) at 0.7 GHz. In addition, upper edge selectivity is found to be 40 dB/GHz along with higher order harmonics suppression up to the 10th order (7 GHz) by a level better than 20 dB. The proposed power divider is experimentally verified with the simulated one and found to be same.

Ultra‐miniaturised C ‐band power divider using capacitive loading and defect grounded structures

“…Shunt open stub between two series inductor was used to reduce size up to 40% with suppression till 4th harmonics 16 . A suppression up to 10th harmonic with a decrease of 71%in size is reported 17 . Isolation degradation during size reduction using DGS is a significant concern.…”

“…16 A suppression up to 10th harmonic with a decrease of 71%in size is reported. 17 Isolation degradation during size reduction using DGS is a significant concern. Instead of using the resistor alone in the isolation network (INW), a series of RLC lumped elements network is used to improve isolation, as reported in the literature.…”

Highly Flexible Uniplanar Dual-Band Power Divider for Arbitrary Source and Load Impedances

“…The other factors affecting the performance including slight shift in the isolation response at 3.5 GHz are the TL discontinuities and in-house fabrication errors such as fabrication tolerances and soldering errors. The additional resonances between the operating frequencies can be suppressed through the harmonic suppression techniques [18]. Also, the circuit performance and features are compared with the recent impedance transforming power dividers in Table 2.…”