A 6-18-GHz Reflectionless Blocker-Canceling Mixer-First Receiver with Maximum 55.6-dB Out-of-Band Rejection for Satellite Communication Systems

With the rapid development of wireless communication, spectrum resources are becoming increasingly crowded, exacerbating out-of-band (OOB) blocking challenges for receivers [1]–[4]. This issue is particularly challenging in frequency-division duplex (FDD) systems, such as satellite communication systems. Figure 1 (top) illustrates that commonly used frequency bands for satellite communication include the X-band and Ku-band. In the Ku-band, for example, the 10.7-12.75 GHz band is allocated for the receiver (RX) and the 13.7-14.5 GHz band is allocated for the transmitter (TX) [1]–[2]. Due to the limited TX-RX isolation, TX leakage signals can enter the RX path, degrading its performance. Thus, the receiver must have sufficient OOB rejection capability, especially for high-side blockers from TX leakage signals (Fig. 1 (top, right)).