The introduction of new technology in the wireless communication industry increases the
number of frequency bands in the communication environment. Therefore, a communication …

Currently, the wireless communication industry is experiencing rapid advances in the
smooth migration and upgrading of technology. Because of this, communication systems …

In this brief, a novel dual-band branch line coupler (BLC) for designing a dual-band Butler
matrix (BM) has been proposed. To realize the proposed BLC, a unique dual-band …

In this article, the design of miniature dual-band quadrature coupler that is capable of
achieving arbitrary power division ratios over the two bands is presented. By employing the …

A dual-band quadrature branch line coupler (BLC) with wide frequency ratio has been
proposed in this paper. A dual-band quarter wave (λ/4) transmission line structure with wide …

Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of
crossed lines at the center of the dual-band coupler enables it to independently provide …

In this article, an analysis of the propagation constant and the characteristic impedance of a
ridge gap waveguide (RGW) is proposed, which includes the comparison of the phase …

In this paper, a coupled-line based dual-band branch-line coupler with port-extensions is
presented. The configuration of the coupler consists of a single coupled-lines section, two …

This article proposes a novel substrate integrated suspended line (SISL) platform with
multiple inner boards, and it uses all FR4 material with very low cost. A new coupling …

This paper reports on multi-band bandpass and bandstop RF filtering four-port couplers with
programmable bands in terms of center frequency and number of passbands/stopbands …