A Compact GSM/ISM Dual-Band 3-dB Hybrid Branchline Coupler Using Unequal Line Lengths and Center- Tapped Stubs on Series Arms
نویسندگان
چکیده
The design of an unequal-length 3-dB hybrid branchline coupler with center-tapped open stubs on series arms is described. The design has been implemented for GSM (900 MHz) and ISM (2.45 GHz) dual-band operation. Simulation results have been verified against experimental results. The agreement between the two sets of results is found to be quite satisfactory. The size reduction, compared to the conventional design, is almost 50 percent. The design is scalable to other frequency-bands, and to substrates other than the one used. Keywords—RF, Microwave, Microstrip, Branchline Coupler, MIC, Dual-Band, Compact.
منابع مشابه
Miniaturization of Broadband 3-db Branch- Line Coupler
In this letter, a new miniaturized broadband 3-dB branchline coupler at the center frequency of 880 MHz is proposed. The proposed coupler is designed by means of integrated miniaturization method, which consists of shunt capacitors, fractal geometry and equivalent miniaturized stubs, to achieve 82% size reduction compared with the referenced coupler. The return loss and isolation are both under...
متن کاملDesign of Compact Multi-Channel Diplexer Using Defected Microstrip Structure
In this paper, two compact quad-channel and six-channel diplexer are designed and fabricated using defected microstrip structure (DMS). This structure is designed for the desired frequency based on the literature reviews. The proposed configuration is composed of a conventional T-junction divider with two pairs of open bended stubs and dual/tri-band filters. In designing dual band filters, a lo...
متن کاملRealization of a Compact Branch-line Cou- Pler Using Quasi-fractal Loaded Coupled Transmission-lines
An extremely compact branch-line coupler operating at 900MHz is presented without the use of via-holes, multilayered technique, or air-bridged. The technique presented here uses the concept of fractals to load a coupled transmission-line in order to realize a compact quarter-wavelength transmission-line, which forms the couplers arms. It is shown that the proposed branch-line coupler’s performa...
متن کاملDual-band Six Port Receiver Module on Silicon
This article details the design of six-port direct conversion front-end module for dual-band (1.575GHz and 2.680GHz) applications. Proposed planar architecture consists of single-stage (1:2) Wilkinson Power Divider and three numbers of quarter-wave 3-dB branch-line couplers working simultaneously at dual band of frequencies. Present article describes the designing of each building block and fin...
متن کاملDevelopment of Forward-wave Directional Couplers Loaded by Periodic Shunt Shorted Stubs
In this paper a new procedure for designing forward-wave directional couplers using periodic shunt short circuited stubs is proposed. A new type of cell using these stubs, which enlarge the phase difference between even- and odd modes of a uniform microstrip coupled line is introduced. Using the equivalent circuit model for even- and odd-modes of the proposed cell, the elements of the ABCD tra...
متن کامل