Anechoic chamber evaluation using the matrix pencil method

Abstract

A new method for evaluation of an anechoic chamber using the matrix pencil method is presented. A signal measured between two antennas placed in an anechoic chamber is sliced into small frequency intervals and is processed using the matrix pencil method. In each interval, the measured signal is decomposed into its propagating-wave components, which correspond to a direct propagation between two antennas and reflected propagating waves from absorbing walls. The ratio of amplitudes of the reflected wave components with respect to the direct path propagation gives a new measure of quality factor for an anechoic chamber.

Gabor schemes for analyzing antenna measurements

“…However, spurious ripples appear in the evolution of the 's accounting for the nonconstant angular frequencies of the chirps with time. We conclude that the MP decomposition is strongly dependent on the cut-off criterion and great care must be taken when trying to discriminate physical contributions from mathematical artifacts in a measured signal [5].…”

“…A considerable effort has been invested in three types of applications: target classification and identification [1]- [3]; radio channel characterization [4]; and antenna measurement and test site characterization [5]- [7]. Two types of approaches have been used to provide high resolution signal analysis.…”

High-resolution propagation measurements using biconical antennas and signal processing

“…The anechoic chamber, shown in Fig. 11, is a rectangular shaped room, with the dimensions 4.9 m high × 6.7 m wide × 8.5 m long [6]. The NIST chamber walls are covered with carbondoped pyramidal absorber, and it has an operational frequency range of 200 MHz -40 GHz.…”

Reconstruction of Antenna Radiation Patterns From Phaseless Measurements in Nonanechoic Chambers

“…In an ideal anechoic chamber, the frequency response for a given angular position is where and are respectively the amplitude and propagation delay of the direct path between transmitter and receiver. However, in a reverberant chamber the propagation channel will be multipath, that is (2) with being the complex amplitudes of the paths, delayed by . In fact, there will only be a few relevant components: the direct path and some strong reflections, one or two for a simple scenario.…”