This paper presents wireless OAM (orbital angular momentum) and OAM-MIMO (multi-input
and multi-output) multiplexing in a 28 GHz frequency band. We have implemented …

A novel 22-GHz-band oscillator using an integrated defected ground structure (DGS) resonator
is presented for quasi-millimeter waveband applications. The DGS is etched on the first …

Massive Multiple-Input Multiple-Output (Massive MIMO), which uses a large number of antenna,
has been investigated to realize high-speed wireless communications. However, as the …

We propose an OAM-MIMO multiplexing system that effectively combines orbital angular
momentum (OAM) and the advantage of multiple input multiple output (MIMO) based digital …

This paper investigates a possibility of application of a virtual inductor realized by an integrated
defected ground structure (DGS) to design a front-end circuit in CMOS technology. Two …

A multi-band mixer that can receive multiple band signals simultaneously is proposed. Using
multiple local oscillator (LO) signals simultaneously, the mixer achieves independent gain …

The optimization technique to realize the minimum group delay (GD) of a 5–10.6 GHz, two
stages CMOS Ultra Wideband power amplifier (UWB-PA) is presented and implemented in …

This paper describes a novel technique to compensate for the intermodulation (IM) distortion
components of high-power amplifiers in an active phased-array antenna system. This …

This paper describes a novel technique to compensate the intermodulation distortion (IM) of
high power amplifiers in an active phased array antenna system. This technique uses IM …

A dual-band mixer that can receive multiple band signals simultaneously is reported. Using
dual local oscillator (LO) signals simultaneously, the mixer achieves independent gain …