The 3D Far-Field Antenna Measurement Technology for Radiation Efficiency, Mean Effective Gain and Diversity Antenna Operation

Abstract

In this paper, facilities of antenna measurement have recently commissioned a spherical far-field measurement system. The low profile far-field spherical scan system provides significant advantages over the older far-field testing including elimination of problem of simple theta (0) and phi (0) rotary axis with indoor far-field range testing, complete measurement characterization of the antenna, and improved accuracy. The mobile phone under test of far-field range testing has been the plan at the Cellular Telecommunications & Internet Association (CTIA) [1] certification program test requirements for performing radiated power and receiver performance measurement. This paper will discuss the antenna and wireless system integration tested with the TRP/TIS and spherical antenna measurement for far-field system. The spherical far-field antenna system applied to total radiation efficiency, mean effective gain (EMG) and diversity gain measurement and applications.

A Novel On-Glass Antenna for Mobile Handset Applications

“…The internal radiator is made by a planar inverter F antenna. The antenna attached on the inner surface of the glass of the display built in a mobile handset is tested for the antenna gain and far-field 3D radiation patterns in an anechoic chamber in free space and handheld conditions [3] [4]. Results of the presented antenna bandwidth are referenced at referenced return loss -6 with bandwidth covering 1550-1650MHz and 2350-2550MHz.…”

Yet another antenna efficiency measurement method in reverberation chambers

“…Since the measurement of the forward (or net) power is rather simple by the means of directional couplers and power meters, the main issue of antenna efficiency measurements is the determination of either the total radiated power, or the power absorbed by the antenna. The former can be achieved by performing a full 3D scan around the antenna in a fully anechoic environment and integration of the measured Poynting vector [4]. This procedure is time consuming, complicated (near field -far field conversion), and error prone, especially for low gain antennas.…”