Beschreibung:
<jats:title>Abstract</jats:title><jats:p>A 0.46–0.52-THz fully-differential quasi-monostatic frequency-modulated continuous-wave (FMCW) radar transceiver was designed in a 90-nm SiGe bipolar CMOS technology with <jats:inline-formula><jats:alternatives><jats:tex-math>$$\textit{f}_{ \textit{T}}/{f}_{\text{max}}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msub>
<mml:mtext>f</mml:mtext>
<mml:mtext>T</mml:mtext>
</mml:msub>
<mml:mo>/</mml:mo>
<mml:msub>
<mml:mi>f</mml:mi>
<mml:mtext>max</mml:mtext>
</mml:msub>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> of 300/480 GHz. The transceiver chip has an area of 2.84 <jats:inline-formula><jats:alternatives><jats:tex-math>$$\text{mm}^{2}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msup>
<mml:mtext>mm</mml:mtext>
<mml:mn>2</mml:mn>
</mml:msup>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula>. A multiply-by-24 frequency multiplier chain is used to generate a 0.48-THz signal from a 20-GHz input signal. Two 0.48-THz push–push doublers are driven in quadrature for a differential output signal with a measured effective isotropic radiated power of up to <jats:inline-formula><jats:alternatives><jats:tex-math>$$-$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mo>-</mml:mo>
</mml:math></jats:alternatives></jats:inline-formula>8.8 dBm at the transmitter at 0.47 THz. A differential subharmonic receiver mixer with a stacked quad topology achieves a measured system conversion gain of 7 dB and a measured single-sideband noise figure of 25.2 dB at 0.471 THz. FMCW radar measurements are performed using an on-board frequency source of a credit card-sized demonstrator at a bandwidth of 60 GHz.</jats:p>