Performance Driven Six-Port Receiver and Its Advantages over Low-IF Receiver Architecture

Table 2

Architectural comparison between SPR and low-IF receiver.

Architecture	Six-port based receiver	Low-IF receiver
Key components	4 × Diode detectors + 3 × quadrature hybrids + 1 × power divider	2 × 4 transistors Gilbert cell mixer +  1 × phase shifter + 1 × power divider + 2 × low pass filters
Bias requirement	No	Yes
Receiver LO; Frequency; Planning	No, same as carrier frequency	Yes
Input RF bandwidth	2–18 GHz	0.7–2.7 GHz
3 dB demodulation bandwidth	~29 MHz	~185 MHz