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A novel wide band switched line phase shifter for the frequency range of 800MHz to 1200 MHz is proposed in this paper. Pin diodes are used for switching the signal between two transmission lines to achieve the desired phase shift. The wide band phase shift is achieved by varying the capacitance of the transmission line using pin diode to vary the capacitance which in turn alters the electrical length...
A novel wide band hybrid ring coupler is proposed in this paper. The change in length of transmission line is calculated and it is converted in to equivalent impedance. Impedance of the circuit is varied using variable capacitor. The device is to be fabricated and tested for frequency range 800-1200MHz. The circuit shows improved isolation and return loss. The circuit is reduced by using Koch fractal...
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