A single-chip 24 GHz receiver front-end using a commercially available SiGe HBT foundry process

Abstract

The authors have demonstrated a fully integrated receive frontend addressing the ISM-Band at 24GHz utilizing a standard SiGe HBT MMIC process with a relaxed emitter scaling of 1.2 pm, for the first time. Extremely compact circuit design and layout techniques are applied to a mature Si/SiGe technology, resulting in a low-cost integrated circuit enabling consumer-oriented systems at Ka band. The integrated components are a preamplifier, a mixer with an IF buffer and a local oscillator. The conversion gain is determined to be 16.3 dB for an intermediate frequency of 100 MHz.

A 24-GHz SiGe phased-array receiver-LO phase-shifting approach

“…To understand the multimode excitation, consider two identical lossless transmission lines and running in parallel and driven by two signal sources and , respectively. If (even-mode excitation), the characteristic impedance of each line is given by (6) where , , and are per-unit-length capacitance to ground, inductance, and mutual inductance, respectively. On the other hand, for a (odd-mode excitation), the characteristic impedance of each line is given by (7) where is the per-unit-length coupling capacitance to the adjacent line.…”

A 24 GHz Class-A power amplifier in 0.13um CMOS technology

“…Also, allotment of frequency band centered around 24 GHz for automotive radar band has increased the interest of researchers in this frequency band. However, the RF front end for most of these systems are implemented on non-silicon technologies [1], [2], [3] making it impossible to be integrated with analog and digital circuits implemented in silicon. However, a few are reported their CMOS design as well [4], [5].…”

Low-power K-band pseudo-stacked mixer with linearity enhancement technique

“…Since many applications were assigned tightly in a microwave frequency region of less than 10 GHz, the quasi-millimeter-wave region around 20 GHz is expected to be further used for next-generation wireless applications. Several building blocks and receivers have been demonstrated at this frequency [1][2][3]. However, the circuits in the previous works consumed much more power than the circuits operating in the microwave frequency region.…”