Spherical Horn Array for Wideband Propagation Measurements

Abstract-The room electromagnetics (RE) theory describes the radio propagation in a single room assuming diffuse scattering. A main characteristic is the exponential power-delay profile (PDP) decaying with the so-called reverberation time (RT) parameter, depending only on the wall area, the volume of the room and an absorption coefficient. The PDP is independent on the location in the room, except for the arrival time. Based on measurements in a room with a spherical array of 16 dualpolarized wideband horn antennas, the current work studies how the RE parameters depend on the receiver (Rx) antenna polarization and orientation. Also the frequency dependence is investigated, with measurements done at both 2.3 GHz and 5.8 GHz center frequencies. The RE theory was found to fit well to the measurements with a RT in the range 22-25 ns. Only small differences were found due to the polarization and the channel gain was depending approximately as expected with frequency.

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“…The main directions of the horn antennas are given in Table I. More details about the horn antennas and the array are available in [6]. Fig.…”

Section: A Spherical Horn Antenna Arraymentioning

confidence: 99%

On Polarization and Frequency Dependence of Diffuse Indoor Propagation

Nielsen

Andersen

Pedersen

et al. 2011

2011 IEEE Vehicular Technology Conference (VTC Fall)

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“…Note that simulation results highly depend on the antenna pattern of the probe antenna. We investigated the impact of orientation error introduced by using a horn antenna as described [6].…”

Section: B Results For Non-ideal Scenario 1) Orientation Error Studymentioning

confidence: 99%

Impact of probe placement error on MIMO OTA test zone performance

Fan

Nielsen

Carreño³

et al. 2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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Standardization work for MIMO OTA testing methods is currently ongoing, where a multi-probe anechoic chamber based solution is an important candidate. In this paper, the probes located on an OTA ring are used to synthesize a plane wave field in the center of the OTA ring, and the EM field for each probe is obtained using FDTD simulation. This paper investigates the extent to which we can control the field structure inside the test zone where the device under test is located. The focus is on performance deterioration introduced by probe placement error including OTA probe orientation error and location mismatch, which are general non-idealities in practical MIMO OTA test systems.

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“…In order to avoid the extra processing related to beam steering, another design of spherical array has been realized at AAU: spherical horn array for frequency range 0.6-6 GHz [13]. The elements of this array are 16 dual-polarized quad-ridged horns with diamond-shaped waveguide section and an open flare, mounted over a sphere in a quasihomogeneous pattern covering theta angles up to 110 degrees (see Fig.…”

Section: Spherical Horn Arraymentioning

confidence: 99%

Spherical arrays for wireless channel characterization and emulation

Fránek

Pedersen

2014

2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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-Three types of spherical arrays for use in wireless communication research are presented. First, a spherical array of 32 monopoles with beam steering in arbitrary direction and with arbitrary polarization is described. Next, a spherical array with 16 quad-ridged open-flared horns is introduced, offering better wideband performance and easier beam steering. Finally, a multi-probe setup for over-theair testing of multiple-input multiple-output mobile devices is presented, being essentially a spherical array with inward radiation.

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Spherical Horn Array for Wideband Propagation Measurements

Cited by 19 publications

References 16 publications

On Polarization and Frequency Dependence of Diffuse Indoor Propagation

On Polarization and Frequency Dependence of Diffuse Indoor Propagation

Impact of probe placement error on MIMO OTA test zone performance

Spherical arrays for wireless channel characterization and emulation

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