OTA measurement of wireless devices with single and multiple antennas in anechoic chamber

Scannavini, A.; Foged, L. J.; Gross, N.; Noren, P.

doi:10.1109/eucap.2014.6902583

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…The efforts in [8], [19] point out the need of a different OTA technology to emulate a spatial-temporal propagation environment at the DUT location. In fact, the performances of MIMO systems depend not only on antenna design but also on propagation characteristics.…”

Section: ) Results For Trpmentioning

confidence: 99%

“…The OTA testing of a SISO system, in which we have one TX and one RX antenna, consists in determining the transmitting and receiving properties of a wireless device by measuring the magnitude and direction of the radiating energy to determine its performance [8]. The main characteristic of OTA measurements is the absence of any wired connection between the antenna on the mobile phone and the radio communication tester.…”

Section: B Total Isotropic Sensitivity (Tis)mentioning

confidence: 99%

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OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Paola

Karstensen

Fan

2018

IEEE Antennas Propag. Mag.

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Abstract-This paper compares Over-The-Air (OTA) performance of traditional voice service and Voice over LTE (VoLTE). The results of the OTA measurements of the antenna performance of 22 mobile phones commonly used over the last two years are presented. VoLTE is a feature included into LTE which allows voice service to be delivered as data flows. Traditional investigations for LTE only include data service and therefore OTA for data services which is measured with the phone held in browsing position by the hand only, whereas the VoLTE uses the same data channel but in a position next to the head held by a hand. Traditional investigations of voice service only include voice service and OTA in voice service. The Figures of Merit (FoMs) taken into account for the ranking of the devices are the Total Radiated Power (TRP) and the Total Isotropic Sensitivity (TIS), related respectively to the transmitter and receiver antennas performance. The investigation includes results for talk mode using left and right hand phantoms next to head to calculate the maximum power radiated by the transmitter. To evaluate the sensitivity of the receiver, performances in talk mode using right hand phantom next to head as well as in data mode using only the hand phantom were considered. The results show a variation in TRP from 9 dB to 17 dB and approximately 9 dB spread in TIS among the phone models in the European LTE bands analyzed. Up to 8 dB difference in TRP between right and left hand usage were found for the worst performing phones, whereas their performances in free space are the same as the best performing phones. Key parameters of our analysis are accuracy, repeatability and testing time, since the equipment and the measurement procedure follow the CTIA Specification.

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Section: ) Results For Trpmentioning

confidence: 99%

Section: B Total Isotropic Sensitivity (Tis)mentioning

confidence: 99%

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Paola

Karstensen

Fan

2018

IEEE Antennas Propag. Mag.

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“…In passive antenna measurement, it was found that the cable from the equipment connected to the antenna plays an important role if antennas have a relatively small ground plane which makes it relatively easy for the current to go to the outside of the feed cable and radiate to contaminate the measurement [15]. The active antenna measurement [14] such as the over-the-air (OTA) performance is one of precise measurement to predict the overall performance compared to passive antenna measurement. Total radiated power (TRP) and total isotropic sensitivity (TIS) are measured in active antenna measurement to determine the performance of transmission and reception respectively.…”

Section: Effect On Ground Planementioning

confidence: 99%

“…If the ground plane is significantly smaller than quarter-wave, antenna tuning becomes difficult and the overall radiation performance is degraded. The active antenna measurement of the complete products [14] such as the overthe-air (OTA) performance is more precise to predict or indicate the power radiated or received compared to passive antenna measurement [15]. In small portable devices, dielectric and PCB antennas are commonly used in the Bluetooth applications, therefore, in this article, design trade-offs and challenges on these antennas for Bluetooth in IoTs applications were reviewed.…”

Section: Introductionmentioning

confidence: 99%

Design Trade-Offs and Challenges on Miniaturized Antenna for Bluetooth in Internet of Things Applications

Mung

2019

ETOAJ

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This article focuses on miniaturized antenna for Bluetooth in Internet of Things (IoT) applications. Dielectric and printed circuit board (PCB) antennas are commonly used in the Bluetooth applications under 2.4GHz industrial, scientific, and medical (ISM) band. Bluetooth Low Energy (BLE) technology is one of the suitable platforms and technology for IoT applications under this ISM band. Antenna is typically occupied one-third size of overall circuit; therefore, a small, low profile and low-cost antenna is a good advantage for the commercial and medical applications. In this article, miniaturized antennas have their pros and cons in its performance and applications were presented as well as the design trade-offs and challenges on dielectric and PCB antennas for Bluetooth in IoTs applications were reviewed.

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“…Moreover, the cost of testing is expensive, and the complexity of the test system increases exponentially. Therefore, multi-probe over-the-air (OTA) testing in millimeter-wave shielded anechoic chambers is becoming the mainstream testing solution [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

A 66–76 GHz Wide Dynamic Range GaAs Transceiver for Channel Emulator Application

et al. 2022

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In this study, we developed a single-channel channel emulator module with an operating frequency covering 66–67 GHz, including a 66–76 GHz wide dynamic range monolithic integrated circuit designed based on 0.1 µm pHEMT GaAs process, a printed circuit board (PCB) power supply bias network, and low-loss ridge microstrip line to WR12 (60–90 GHz) waveguide transition structure. Benefiting from the on-chip multistage band-pass filter integrated at the local oscillator (LO) and radio frequency (RF) ends, the module’s spurious components at the RF port were greatly suppressed, making the module’s output power dynamic range over 50 dB. Due to the frequency-selective filter integrated in the LO chain, each clutter suppression in the LO chain exceeds 40 dBc. Up and down conversion loss of the module is better than 14 dB over the 66–67 GHz band, the measured IF input P1 dB is better than 10 dBm, and the module consumes 129 mA from a 5 V low dropout supply. A low-loss ridged waveguide ladder transition was designed (less than 0.4 dB) so that the output interface of the module is a WR12 waveguide interface, which is convenient for direct connection with an instrument with E-band (60–90 GHz) waveguide interface.

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OTA measurement of wireless devices with single and multiple antennas in anechoic chamber

Cited by 7 publications

References 1 publication

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

OTA Evaluation of Mobile Phone Antenna Performance for VoLTE [Measurements Corner]

Design Trade-Offs and Challenges on Miniaturized Antenna for Bluetooth in Internet of Things Applications

A 66–76 GHz Wide Dynamic Range GaAs Transceiver for Channel Emulator Application

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