Journal ArticleDOI
A New MIC Magic-T Using Coupled Slot Lines
M. Aikawa,H. Ogawa +1 more
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TLDR
In this paper, a novel microwave integrated circuit (MIC) 180/spl deg/ hybrids (magic-T's) suitable for MIC are described, which make use of the two orthogonal modes (even and odd) of the coupled slot lines, and, therefore, have special port location.Abstract:
Novel microwave integrated circuit (MIC) 180/spl deg/ hybrids (magic-T's) suitable for MIC are described. They make use of the two orthogonal modes (even and odd) of the coupled slot lines, and, therefore, have special port location, which is quite different from that of the conventional 180/spl deg/ hybrids such as a rat-race. That is, the two-ports, which correspond to the E-arm and the H-arm of the well-known waveguide magic-T, can be located on the same side, opposite to the other two ports. This feature is of a great practical advantage when applied to an MIC, because the crossing of the transmission lines can be omitted when this type of magic-T is applied to balanced-type circuits such as balanced mixers. Satisfactory experimental results at a center frecuency of 6 GHz are given. The isolation between the E- and the H-ports is better than 30 dB over an octave band, and the frequency sensitivity of the coupling is almost flat in the frequency range from 2 to 10 GHz.read more
Citations
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Journal ArticleDOI
Reduced-size branch-line and rat-race hybrids for uniplanar MMIC's
TL;DR: In this article, a method of miniaturizing branch-line 90 degrees hybrid and 180 degrees rat-race hybrid was proposed, which utilizes combinations of short high-impedance transmission lines and shunt lumped capacitors.
Journal ArticleDOI
Design and Performance of Coplanar Waveguide Bandpass Filters
Dylan F. Williams,S. E. Schwarz +1 more
TL;DR: In this paper, the admittance inverter parameters of the coupling gaps between resonant sections are deduced from experiment, and bandpass filter design rules are developed, which allows easy filter synthesis from "prototype" low-pass designs.
Journal ArticleDOI
Double-sided MICs and their applications
M. Aikawa,H. Ogawa +1 more
TL;DR: In this article, the basic concept and features are presented of double-sided microwave integrated circuits (double-sided MICs), which effectively utilize various kinds of transmission lines on both sides of a substrate.
Journal ArticleDOI
New uniplanar coplanar waveguide hybrid-ring couplers and magic-T's
Chien-Hsun Ho,Lu Fan,Kai Chang +2 more
TL;DR: In this article, a reverse-phase coplanar waveguide (CPW) hybrid-ring coupler and a uniplanar CPW magic-T were developed, and the results showed that the hybrid ring coupler has a 60% bandwidth centered at 3 GHz with 0.4 dB amplitude imbalance and 3.5/spl deg/ phase imbalance.
Journal ArticleDOI
A Broadband Planar Magic-T Using Microstrip–Slotline Transitions
TL;DR: In this article, an improved version of a broadband planar magic-T using microstrip-slotline transitions is presented, which implements a small microstrip slotline tee junction with minimum size slotline terminations to reduce radiation loss.
References
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Journal ArticleDOI
A Method of Analysis of Symmetrical Four-Port Networks
J. Reed,G.J. Wheeler +1 more
TL;DR: In this article, an analysis of four-arm symmetrical networks such as a branched directional double stub coupler or the hybrid ring (rat race) is presented, where the input wave is broken into an even and an odd mode and the vector amplitude out the various arms is computed from the sums or differences of the reflection or transmission coefficients for the two modes.
Journal ArticleDOI
Analysis of Coupled Slots and Coplanar Strips on Dielectric Substrate
J.B. Knorr,K. Kuchler +1 more
TL;DR: In this paper, a frequency-dependent hybrid-mode analysis of single and coupled slots and coplanar strips is presented, where the dispersion characteristic and characteristic impedance of the structures are obtained by applying a Fourier transform technique and evaluating the resulting expressions numerically using the method of moments.
Proceedings ArticleDOI
A New Class of Microstrip Directional Couplers
TL;DR: By using Cohn's slotline in combination with a microstrip, simple 90/spl deg/ as well as 180/spl Deg/ directional couplers of any coupling value can be made.
Journal ArticleDOI
Dispersion characteristics of slot lines
Tatsuo Itoh,Raj Mittra +1 more
TL;DR: In this article, a new numerical method is developed for the analysis of dispersion characteristics of slot lines, which is applied in the Fourier transform domain to derive a determinantal equation for the propagation constants.
Journal ArticleDOI
Slot Line Application to Miniature Ferrite Devices
G.H. Robinson,J.L. Allen +1 more
TL;DR: In this paper, preliminary results and conclusions of experimental investigation of the potential usefulness of slot transmission line are presented and compared with theoretical predictions, including phase constant, insertion loss, and other general characteristics.