DocumentCode :
191174
Title :
Ultra-wideband compact slot-coupled 180° hybrid based on ultra-wideband Wilkinson power divider
Author :
Abdalla, Yasmine ; Hammad, Hany
Author_Institution :
Fac. of Inf. Eng. & Technol., German Univ. in Cairo, Cairo, Egypt
fYear :
2014
fDate :
6-9 Oct. 2014
Firstpage :
231
Lastpage :
234
Abstract :
In this paper, a novel 180° coupler is proposed. The proposed hybrid uses the input port of an ultra wide band Wilkinson power divider as the summation port and replaces the resistor by an additional fourth port having the same characteristic impedance; this port will act as the difference port. The design of the proposed hybrid is developed using microstrip line and slot line, hence avoiding any complex structures. This configuration results in a broadband frequency performance where the return loss of the sum port and delta port is less than 10 dB for 80% bandwidth. Due to its symmetric configuration, the power imbalance and the phase imbalance between the output ports is less than 0.5 dB and 1°, respectively for over 200% bandwidth. The proposed hybrid also exhibits summation and difference port isolation with a measured result less than -40 dB over the complete range of frequency.
Keywords :
coupled transmission lines; microstrip couplers; microstrip lines; power dividers; slot lines; ultra wideband technology; 180° coupler; broadband frequency performance; characteristic impedance; complex structures; delta port; difference port isolation; microstrip line; phase imbalance; power imbalance; resistor; return loss; slot line; sum port; summation port; symmetric configuration; ultra-wideband Wilkinson power divider; ultra-wideband compact slot-coupled 180° hybrid; Bandwidth; Broadband communication; Couplers; Microstrip; Ports (Computers); Power dividers; Slot lines; 180° hybrid; UWB; Wilkinson power divider; insertion phase; slotline transition;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
Type :
conf
DOI :
10.1109/EuMC.2014.6986412
Filename :
6986412
Link To Document :
بازگشت