This paper presents a complete 5G phased-array base-station, which consists of 2×32 element phased-arrays, each with vertical and horizontal polarization (V&H) for 5G polarization MIMO operation. The array is based on high performance 24-30 GHz 2×2 beamformer chips and a 22-44 GHz wideband up/down-conversion transceiver chips, which are placed on the same PCB with all the other supporting circuitry. An EIRP of 44-46 dBm is measured at 25-30 GHz, with -35 to -40 dBc LO leakage, <; -30 dBc cross-polarization levels, and 40-100 dBc single-sideband rejection. The array scans to ±50° in the azimuth plane and ±40° in the elevation plane for both polarizations. Single- and dual-beam complex modulation measurements demonstrate that the 2×32 element V&H array can support multi-standard and multi-gigabit-per-second 5G communication links with polarization MIMO. All measurements are done without any calibration, greatly reducing the overall system cost. To the author's knowledge, this work achieves state-of-art performance in terms of EIRP, LO rejection, SSB rejection, and power consumption.

The next World Radio Conference (WRC) will be held in November 2019 in Geneva, Switzerland. This paper discusses WRC-19 agenda items that could impact scientific uses in Earth satellite remote sensing and radio astronomy.

An overview of recent progress in the research and development of micromachined devices for use in wireless communication subsystems is presented. Among the specific devices described are tunable micromachined capacitors, integrated high-Q inductors, micromachined low-loss microwave and millimeter-wave filters, low-loss micromechanical switches, microscale vibrating mechanical resonators with Q's in the tens of thousands, and miniature antennas for millimeter-wave applications. Specific applications are reviewed for each of these components with emphasis on methods for miniaturization and performance enhancement of existing and further wireless transceivers.

A comprehensive review of integrated circuit antennas suitable for millimeter and terahertz applications is presented. A great deal of research was done on integrated circuit antennas in the last decade, and many of the problems associated with electrically thick dielectric substrates, such as substrate modes and poor radiation patterns, have been understood and solved. Several antennas, such as the integrated horn antenna, the dielectric-filled parabola, the Fresnel plate antenna, the dual-slot antenna, and the log-periodic and spiral antennas on extended hemispherical lenses, which have resulted in excellent performance at millimeter-wave frequencies, are covered in detail. A review of the efficiency definitions used with planar antennas is included.>