A 202 GHz Link Using Planar Transceiver Modules

We report a 202 GHz wireless data transmission link, communicating 32
$\text{Gb}/\mathrm{s}$
over 7.1 meters, using planar InP HBT transmitter and receiver modules. The modules are highly integrated and require simple physical assembly without waveguide interfaces. A single 2.8 mm
$\times\ 0.75$
mm InP HBT transmitter IC and a single 2.3 mm
$\times\ 0.85$
mm InP HBT receiver IC, operating from a 24.5 GHz local oscillator (LO) reference, provide frequency conversion between 6 GHz (I, Q) intermediate-frequency (IF) and the 202 GHz modulated carrier. Signals are radiated and received by directly wire-bonding the InP ICs to
$2\times 2$
patch antenna arrays on 50
$\mu\mathrm{m}$
SiO
2
substrates, with these antennas coupled to external 50 mm diameter PTFE lenses. 8 Gbaud 16QAM data transmission (32 Gb/s) over 7.1 m, on a link with 10.4 dB added attenuation, showed 13.4% RMS error vector magnitude.