Open AccessThree‐octave band in‐phase power divider using loosely coupled microstrip lines and microstrip to slotline transitions
Author(s) -
Ahmed U.T.,
Abbosh A.M.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.3119
Subject(s) - microstrip , microwave , bandwidth (computing) , resistor , power dividers and directional couplers , electrical impedance , materials science , frequency band , electrical engineering , planar , wilkinson power divider , optoelectronics , telecommunications , voltage , engineering , frequency divider , computer science , computer graphics (images)
A planar microwave in‐phase power divider operating over three‐octave frequency band is presented. The proposed device is composed of two main parts. The first one is a pair of microstrip–slotline–microstrip transitions introduced to match the impedances at the input port. The second one is a pair of loosely coupled microstrip lines with two isolation resistors to provide improved isolation performance at the output ports over a wide range of frequency band. The device has a compact area of 40 × 40 mm using the substrate RO4003C (dielectric constant of 3.38 and thickness of 0.406 mm). The simulated and experimental results of the developed device show three‐octave bandwidths (155% fractional bandwidth) with isolation >15 dB across the investigated band from 1 to 8 GHz. In addition, the device provides a <±2° differential phase between the in‐phase output ports across the whole frequency band.