|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|159133||2017||15 صفحه PDF||سفارش دهید||3705 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : AEU - International Journal of Electronics and Communications, Volume 71, January 2017, Pages 30-36
This paper presents wideband compact differential reflective phase shifter based on the double layer slot-coupled coupler configuration. This novel phase shifter arrangement consists of a 3-dB hybrid coupler with the coupled and transmission ports terminated with rectangular and elliptically shaped microstrip loads. By altering the ports termination of the coupler, phase shifters propose differential phase ranging from â90Â° to +90Â° over 1.3â5.9GÂ Hz frequency band. To achieve different range of phase performance, the proper reactance is calculated at the outputs of coupler. These reactances are transformed to the elliptical or rectangular-shaped microstrip load with various dimensions for every phase shifter. The calculation and simulations results show that the developed circuits could provide Â±30Â°, Â±60Â°, Â±45Â° and Â±90Â° differential phase shifts. For verification of this wideband phase shifter design method, two phase shifter example with rectangular and elliptical load termination is fabricated and measured. The measured return loss of the phase shifter with elliptically load is better than 10Â dB over 1.3â5.9GÂ Hz frequency band as well as insertion loss is less than 1Â dB. The phase shift deviation is less than 2.1Â°. The results demonstrate that the proposed phase shifters are well suited for use in GPS/LTE/WiMax/WLAN frequency bands.