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Low cost and compact directional coupler for ultrawideband applications
Author(s) -
Zaidel Dyg N. A.,
Rahim Sharul K. A.,
Seman Norhudah,
Rahman Tharek A.,
Abdulrahman A.
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26616
Subject(s) - return loss , microstrip , microwave , hybrid coupler , magic tee , rat race coupler , broadside , power dividers and directional couplers , ground plane , engineering , electrical engineering , optics , electronic engineering , physics , telecommunications , antenna (radio)
A design of a compact size (35 × 15 mm 2 ) 3‐dB coupler with ultrawideband (UWB) characteristic is demonstrated in this article. The proposed design is accomplished by forming two diamond‐shaped microstrip lines that are broadside coupled by a slot at the middle ground plane. The dimension of the design was initialized using a simple mathematical formula and optimized using the CST microwave studio simulator. The design coupler is fabricated and measured. It shows comparable results of the simulation and measurement for the phase difference between two output ports, return loss, isolation, and 3‐dB coupling over an UWB frequency range between 4 and 8.34 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:670–674, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26616