This paper presents an elegant yet straightforward design procedure for a compact rat-race
coupler (RRC) with an extended harmonic suppression. The coupler's conventional/4 …

Both branch-line and rat-race couplers are easily realized using planar circuit technology as
they employ only transmission lines without additional components. However, as the …

In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-
race hybrid coupler. The proposed structure can achieve both a significant reduction of size …

This paper introduces a novel algorithm for designing a low-pass filter (LPF) and a microstrip
Wilkinson power divider (WPD) using a neural network surrogate model. The proposed …

The branch-line coupler (BLC) is an important device in radio frequency (RF) and
microwave (MW) circuits. The main drawbacks of the conventional BLC are as follows: first …

This letter presents a planar power divider with an effective technique for nth harmonics
suppression. The proposed technique served by a microstrip electromagnetic bandgap cell …

Previous hybrid couplers have output phase difference that have either been 0°, 90°, or
180°. Other phase differences could only be realized using additional phase-shift elements …

A novel technique for harmonic suppression and size reduction in planar Wilkinson power
divider is presented. The proposed technique served by a microstrip electromagnetic …

In this paper, a high-sensitive microwave dielectric sensor targeted for material permittivity
characterization is proposed. A reflective voltage controlled oscillator is devised by virtue of …

This letter describes a miniaturized spurious pass-band suppression rat-race coupler using
compensated spiral compact microstrip resonant cell (C-SCMRC) resonators. A distributive …