A 22 to 28 GHz SiGe Superregenerative Amplifier with Integrated Quench Pulse Shaping for FMCW Radar Active Reflector Tags

Integrated superregenerative amplifier based 24 GHz frequency modulated continuous wave radar active reflector tags for joint ranging and communication

“…The SRA buf presented in Ref. [25] wire‐bonded to the antennas in ART buf is shown in Figure 9b. As seen, the RF inputs and outputs are double‐bonded to reduce the inductance, and thereby losses when driving and receiving from the antennas.…”

“…It is seen from Equations ( 11) and (15), that in order to maximise the distance covered, it is required to increase not just the sensitivity of the SRA, but gain and output saturated power as well. So a novel quench pulse shaping was implemented in previous works of the same authors [24,25]. While ART buf uses SRA buf from Ref.…”

“…While ART buf uses SRA buf from Ref. [25], and the design of SRA dir used in ART dir is new as discussed in Section 4.2.…”

“…The circuit takes advantage of the difference in threshold voltage values of the diode connected nFET M 1 and HBT T 6 , and is similar to our implementation in Ref. [25]. The quench pulse shaping also enables SRA to be used with commercial clock and pulse width modulation ICs having CMOS or TTL output voltage swings.…”

“…The second ART (ART buf ) illustrated on the right side of Figure 1a uses a buffered superregenerative amplifier (SRA buf ) IC from Ref. [25] by the same authors. ART buf feature antenna diversity enabled by the separate inputs and output buffers of SRA buf .…”