State-of-the-art permittivity reconstruction with the transmission and reflection methods reduce the available bandwidth as they introduce ringing. Available frequency extension approaches to avoid a bandwidth reduction are not based on a physically meaningful estimate. In this work, a method that takes advantage of the information already given by the measurement to calculate a reasonable frequency extension is proposed. The benefits of the reconstruction techniques are demonstrated and evaluated in detail on simulation and measurement data in V-band.

Inductors with both a high quality factor QL and a low temperature coefficient of inductance TCL are crucial for highly stable, fully integrated frequency references. The paper presents tapered multipath inductors in a standard CMOS technology that achieve QL > 8 and TCL = 1 ppm/°C in aluminum-based (Al) top metal and reach QL > 19 with a TCL = 30 ppm/°C in a thick copper-based (Cu) metal layer, both at 2 GHz.

This article presents a scalable interbeam interference cancellation (IBIC) scheme at intermediate frequency (IF) using an IF receiver (IF-RX) chip. The IF-RX provides the flexibility of not just interference rejection between the subarrays but also wideband signal combining over multiple subarrays. It also provides wideband filtering before the analog-to-digital converter (ADC) to support 5G channel bandwidths of up to 800 MHz, high linearity, and low noise figure.

This article presents a new viewpoint of categorizing and utilizing various types of a priori knowledge (APK) in microwave medical imaging (MMI), which is acquired from the space, time, or frequency (STF) domain. The article starts with a general categorization framework of APK, followed by formulations of MMI algorithms utilizing APK. Subsequently, the existing APK-oriented MMI algorithms are reviewed in the respective STF domain. Finally, the influence of accuracy of APK on MMI performance is discussed using numerical examples.

This letter presents a broadband, low insert loss 6-bit switch-type digital step attenuator implemented in a 0.25-μm GaAs pHEMT process. The π-type attenuation units adopt the proposed capacitive-inductive joint compensation technique, in which the inductor demonstrates an effective zero-pole adjustment to broaden the bandwidth. This DSA maintains a 31.5-dB attenuation range with a 0.5-dB step. Measured results indicate that the RMS amplitude and phase errors are less than 0.35 dB and 5° from DC to 23 GHz.