Active antenna

About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.

Active Antenna Module for Low-Cost Electronically Scanned Phased Arrays

Abstract: This paper describes a low-cost compact active antenna module that includes transmit/receive/mixer electronics and a dual-polarized antenna element for half-duplex operation at 10 GHz. The system-in-package module has been fabricated in a ball-grid-array package. It is particularly suited for large low-cost low-power phased-array applications. Measurements at IF of single element gain show cross-pol reduced 18 dB. A small compact array was fabricated and measured. Simulations show that coupling between modules in a tightly packed infinite array caused a small reduction in scan range.

Performance Evaluation of 3D MIMO LTE-Advanced System

Abstract: This paper demonstrates a simulation methodology based on a reasonable 3D channel model System level simulations on various 3D antenna port configurations are performed, and results are compared with those of 2D MIMO system Several interesting observations are made from the evaluation results: (1) the vertically distributed active antenna elements provide less MIMO gain than the horizontally distributed active antenna elements; (2) with the same number of antenna elements, the 3D active antenna configuration can provide better performance than the 2D one, and the performance improvement is much larger for MU-MIMO than SU-MIMO; (3) even when the 2D antenna configuration has more antenna elements (providing more antenna array gain) than the 3D active antenna configuration, the 3D configuration can still outperform the 2D one if there are enough transmitter ports

Novel M-Sequence UWB Sensor for Ground Penetrating Radar Application

Abstract: The article gives a brief overview of the ongoing research in the field of the ultra wideband (UWB) front-end circuits for ground penetrating radars (GPRs). The novel concept for GPR front-end circuits exploiting electrically short active antenna is considered. The designed low cost active antenna achieves the wide frequency band of the radar system and minimal dimensions. In the paper, measurement results with designed circuits for the active dipole UWB antenna are presented. The circuits offer enhanced user experience in comparison to currently used conventional GPR systems.

Circuits and Active Antennas for Ultra-Wide Band Pulse Generation and Transmission

Abstract: In this paper, the design and development of a novel active antenna including circuits for Ultra-wide band (UWB) pulse generation and transmission have been described. In this design a pulse with pulse-width approximately 150ps and amplitude 500mV (peak-to- peak) was generated using a single high electron mobility transistor (HEMT) as the active device (and an optional Schottky diode for enhanced performance), this being the simplest circuit for generating UWB pulses as far as we know. This circuit was integrated with a newly designed UWB planar microstrip-fed slot antenna, which is an active antenna in the sense that in addition to radiating the signal, it also acts as a fllter, which tailors the spectrum of the transmitted pulse to a shape close to that recommended for UWB communications. We have also given a quantitative analysis, which explains the operation of the circuit.

Compact, wide-band, integrated active module for radar and communication systems

Abstract: An integrated module (14) for an active antenna assembly is disclosed. The integrated module is switchable between a receive mode and a transmit mode and includes active components and a dual input wideband balun (34). The active components includes amplifiers (26, 36) and micro electro-mechanical system (MEMS) switches (22, 24). The integrated module is adapted for positioning directly behind a radiator of an antenna array.