Verification of a Contactless Characterization Method for Millimeter-Wave Integrated Antennas

Biggelaar, A.J. van den; Galesloot, Esme; Franciscus, Adrianus Cornelis; Smolders, A.B.; Johannsen, Ulf

doi:10.1109/tap.2020.2963934

Cited by 6 publications

(8 citation statements)

References 17 publications

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“…With all chips in Tx back-off conditions, the temperature sensor readings did not exceed 50°C. This is 15°C lower than the peak temperatures of an array with 4×8 similar chips in Tx mode using forced air cooling as reported in [35], and up to 36°C and 54°C lower than the passively-cooled arrays with 4×4 similar BFICs in [34]. The observed temperature uniformity also compares well to the variations of 7°C in [35] and 15-24°C in [34].…”

Section: E Element Excitation and Thermal Performancesupporting

confidence: 63%

“…This is 15°C lower than the peak temperatures of an array with 4×8 similar chips in Tx mode using forced air cooling as reported in [35], and up to 36°C and 54°C lower than the passively-cooled arrays with 4×4 similar BFICs in [34]. The observed temperature uniformity also compares well to the variations of 7°C in [35] and 15-24°C in [34]. Considering the thousands of elements used, a total power dissipation in the order of 4 and 12 kW is expected for the full-scale sparse and amplitude-tapered arrays, respectively.…”

Section: E Element Excitation and Thermal Performancementioning

confidence: 52%

“…As the subsystems of the realized demonstrator are highly integrated, OTA measurement setups based on [35] were used to verify their performance. The methods, results and deductions from each setup are presented in this section.…”

Section: Demonstrator Measurementsmentioning

confidence: 99%

“…The method to determine the EIRP in Tx has been adapted from [35]. After calibration, the transmitarray is placed in the farfield of a reference 20 dBi gain horn characterized in [35], as shown in Fig. 17b.…”

Section: Eirp and Gain Measurementmentioning

confidence: 99%

See 3 more Smart Citations

A 34- to 36-GHz Active Transmitarray for Ka-Band Tracking Radar Using 5G Tx/Rx Beamforming ICs: Design and 64-Element Demonstrator

Kok

Vertegaal

Smolders

et al. 2023

IEEE Trans. Antennas Propagat.

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Section: E Element Excitation and Thermal Performancesupporting

confidence: 63%

Section: E Element Excitation and Thermal Performancementioning

confidence: 52%

Section: Demonstrator Measurementsmentioning

confidence: 99%

Section: Eirp and Gain Measurementmentioning

confidence: 99%

See 2 more Smart Citations

A 34- to 36-GHz Active Transmitarray for Ka-Band Tracking Radar Using 5G Tx/Rx Beamforming ICs: Design and 64-Element Demonstrator

Kok

Vertegaal

Smolders

et al. 2023

IEEE Trans. Antennas Propagat.

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“…An effective way to perform AR compensation on an active array is to perform an over-the-air (OTA) sweep of the VMs of the array. This can be carried out by measuring the transfer coefficient from the input of the array to a measurement probe, and sweeping the gain and phase settings of the VM, like explained in [41]. Using this data, the best amplitude and phase component can be selected resulting in the lowest AR.…”

Section: Ar Compensationmentioning

confidence: 99%

A Polarisation-Agile Phased-Array Antenna for Satellite and beyond-5G Communications

Hastenberg

Theis

Mazaheri

et al. 2022

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

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A dual-linear polarised 8-by-8 array of stacked patches is proposed as a flexible, UAV-based, gateway node for Satcom and 5G. The array uses a triangular grid with sequential rotation for a frequency range of 37 GHz to 42 GHz. The scan range extends from −50 • to 50 • on all ϕ-planes while maintaining a scan-loss below cos(θ) 1.1 for most of these scan angles. Moreover, the broadside total active reflection coefficient is below −11.5 dB for the whole frequency range. Circular polarisation is achieved by reconfiguring the two linear polarised ports utilising the beamforming integrated circuits on the phased array to provide the phase difference. The axial ratio is maintained below 3 dB for the whole scan range in the ϕ0 = 0 and ϕ0 = 90 cut. Furthermore, an axial ratio compensation mechanism is presented. This mechanism will use the vector modulators embedded on each antenna port to minimise the axial ratio. The compensation mechanism is experimentally verified on an 8-by-8 active antenna array with similar specifications, where an axial ratio of 0.5 dB is achieved. I. INTRODUCTIONT HE ever-growing market for connected devices has increased the demand for bandwidth and flexibility of communication systems. In order to accommodate the required bandwidth, moving towards millimetre-wave (mm-Wave) frequencies is required. However, mm-Wave frequencies suffer from significant path loss, attenuation, and blockage [1]. Phased-array antennas (PAAs) will be used to compensate these losses, whereas gateway (GtW) nodes [2], a system category between a base station and user terminal, are proposed to prevent blockages by functioning as signal repeaters. Unmanned aerial vehicles (UAVs) have been investigated as flexible GtW nodes in [3] for the fifth generation of mobile communication (5G) and beyond systems.This system, UAV based, is also proposed as a flexible communication interface between satellite communication (Satcom) systems and mobile technologies. A schematic view of this use-case is shown in Fig. 1. In order to serve as a GtW between Satcom and mobile communication systems, UAV based PAAs need to provide both circular-polarised (CP) and linear-polarised (LP) beams -as Satcom uses CP and most mobile communication systems require LP. A possible means to achieve both communication systems is by implementing two separate antenna architectures on a single GtW. However, the system should comply with the stringent swap-c (Size, Weight, Power, and Cost) requirements of . A flexible way to achieve both communication systems is by using a reconfigurable dual-LP antenna element.

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Amplifier-Integrated Active Array Antennas for millimeter-Wave Radar

de Kok,

Monni,

van Heijningen

et al. 2023

2023 IEEE Conference on Antenna Measurements and Applications (CAMA)

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Verification of a Contactless Characterization Method for Millimeter-Wave Integrated Antennas

Cited by 6 publications

References 17 publications

A 34- to 36-GHz Active Transmitarray for Ka-Band Tracking Radar Using 5G Tx/Rx Beamforming ICs: Design and 64-Element Demonstrator

A 34- to 36-GHz Active Transmitarray for Ka-Band Tracking Radar Using 5G Tx/Rx Beamforming ICs: Design and 64-Element Demonstrator

A Polarisation-Agile Phased-Array Antenna for Satellite and beyond-5G Communications

Amplifier-Integrated Active Array Antennas for millimeter-Wave Radar

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