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This paper describes a 28GHz CMOS direct conversion transceiver with packaged 2×4 patch antenna arrays for 5G communication. Test results show good RF performances of Rx NF 6.7dB, Maximum Tx EIRP 31.5dBm (1PA Pout_sat =10.5dBm), LO integrated phase noise −37.8dBc (0.67°), Rx/Tx EVM around 2.2% (−33.1dB) at mid RF power, and well-fitted beam control capability.
This paper introduces a real-time multiple input and multiple output (MIMO) channel sounder to measure the vehicle-to-vehicle (V2V) propagation channel at 5.9 GHz. Compared to the existing V2V channel sounders, our design emphasizes on improving the stability of the setup and increasing the MIMO snapshot rate. The system stability allows us to develop a high resolution parameter extraction algorithm...
Demonstration of low conversion loss through the novel integration and packaging of high power photodiodes and a fragmented aperture antenna for a fiber-fed RF array.
In this paper, efficient EMF compliance test methodologies for large size array antennas with beam forming capabilities are proposed and evaluated. Different approaches based on the characteristics of a central element or a number of elements that are essential for describing the array behavior have been investigated and compared with a full-wave reference solution. The results show that for electrically...
Beam steering and beam shaping with parasitic array antennas pose a suitable alternative to expensive phased array technology. Parasitic array antennas mainly consist of one or few active antenna elements which are surrounded by passive elements. The parasitic reactances of the passive elements can be controlled either by electronic tuning or switching. Doing this in a suitable way different antenna...
This paper describes the definition, manufacturing and testing of the antenna breadboard demonstrator intended for the MetOp-SG SCAtterometer Instrument. The breadboard is a dual polarization array antenna composed of separate radiating panels for H and V polarizations, respectively. The panels with the supporting structures are undergoing a test campaign that comprises thermal cycling, vibration,...
This paper discusses the integration of an inverted- F antenna with solar cells for power harvesting. The objective is to achieve a multi-source energy collecting system in order to improve the RF to DC conversion efficiency. The inverted-F antenna can be used either for communication or to scavenge the ambient RF energy when connected to the appropriate rectifying circuit. A prototype of the antenna...
This paper presents millimeter wave phased array antenna for short range communication applications at 35 GHz. The antenna array is formed by 1 × 16 microstrip antipodal tapered slot antennas each connected to RF MEMS phase shifters for beam steering. The simulation and measurement results of the single antenna element are presented and the phase shifter structure to be used in the array is described...
The integration of arrays of inverted F-antennas on the top of a solar cell is discussed in this paper. The antenna elements are placed orthogonal to the left and right edges of the solar cell. On each edge, one array composed of two element inverted-F antennas covering a specific operating bandwidth are placed. Prototype antennas are fabricated and tested and the results show good agreement with...
A technique for low-cost beam steering through direct injection of the local oscillator (LO) signal to a linear array is proposed. Design and fabrication of a single element required for realization of this frequency-scanning array are reported.
This paper presents the development and construction of a low-cost passive phase conjugating array (PCA) antenna aiming the mitigation of multipath phenomena at 6 GHz. The implementation of the proposed array was performed on woven fiber glass substrate using both discrete and integrated circuits. Measurement results, obtained inside an anechoic chamber, from a 16-element PCA antenna under multipath...
This article presents the methodology for de-embedding the effect of a printed array of probes in a planar very-near-field measurement system. The effect of the individual probes and their feed lines is de-embedded using a proprietary calibration process. Then, the effect of the large printed array on the field distribution around the antenna under test (AUT) is estimated using a combination of simulation...
This paper describes the development and deployment of “tile” array technology, which is the foundation of lighter and cheaper AESA antennas. Close agreement is demonstrated between the modelled and measured performance of an X-band array, which provided azimuth and elevation beam-steering over a 20% bandwidth. Furthermore the authors show how the thinness of the tile can be exploited in a multi-facet...
We have proposed a novel direction-of-arrival (DOA) estimation antenna based on the mono-pulse system. The DOA estimation antenna is constructed with microstrip antennas and Magic-T circuits which generate Σ and Δ signals from received RF signals. As the Both-sided MIC technology is used for the feed circuit, the proposed antenna has a good performance with simple structure. In this paper, a DOA estimation...
A planar Ku-band broadband phased array antenna has been realized for satcom terminals suited for aeronautical platforms. The antenna Rx module includes an RF front-end connected to an optical beam forming module. This combination guarantees a squint-free beam steering over the whole commercial Rx Ku-band. This document describes the design, manufacturing and testing of the RF front-end.
A first-of-the-kind 28 GHz antenna solution for the upcoming 5G cellular communication is presented in detail. Extensive measurements and simulations ascertain the proposed 28 GHz antenna solution to be highly effective for cellular handsets operating in realistic propagating environments.
Massive MIMO, also known as very-large MIMO or large-scale antenna systems, is a new technique that potentially can offer large network capacities in multi-user scenarios, where the base stations are equipped with a large number of antennas simultaneously serving multiple single-antenna users on the same frequency. However, the radio-frequency (RF) chains associated with the antennas increase the...
We present a design of multi-beam antenna system using a hybrid scheme of analogous and digital beam-forming mechanisms. Exponentially tapered slot antennas are used as the array elements for a potential broadband operation. The system was prototyped to examine its characteristics in the beam-forming and interference cancellation.
We report on a 44-GHz Transceiver Array architecture that integrates all required functionality for rf beamforming and radiation using a single 16-channel Silicon-Germanium rf beamforming integrated circuit, a 4×4 array of wide-scan patch antennas, and a compact, rugged, micromachined three-dimensional structure for rf and dc interconnect and thermal management. The subarray tile is fabricated using...
This paper presents the first 16-element wafer-scale phased array transmitter with scanning in both the E-and H-planes. The chip integrates a 108–112 GHz source, together with a 1∶16 distribution network, amplifiers, 2-bit phase shifters on each cell, and an on-chip high efficiency differential dipole antenna. Measured patterns show scanning to +/−30° in both planes, and agree well with simulations...
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