This paper provides insight into the thermal drift in insertion characteristics of the T/R module and its effect on the radiation performance of an active phased array antenna. An efficient liquid-cooled heat exchange...
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ISBN:
(纸本)9781665458757
This paper provides insight into the thermal drift in insertion characteristics of the T/R module and its effect on the radiation performance of an active phased array antenna. An efficient liquid-cooled heat exchanger plate is considered to achieve thermal equilibrium in an active phased array antenna to maintain its radiation performance. Herein, a theoretical investigation is carried out to quantify degradation in radiation performance due to change in complex excitation of radiation element at high temperature. This analysis provides theoretical guidelines for the reliable operation of active phased array antennas without performance degradation at high temperatures
In this paper, the design, implementation and validation of a mm-Wave multipurpose system to perform antenna measurements, active antenna arraycalibration, material characterization, and radome testing is presented. ...
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ISBN:
(纸本)9781728196978
In this paper, the design, implementation and validation of a mm-Wave multipurpose system to perform antenna measurements, active antenna arraycalibration, material characterization, and radome testing is presented. The proposed system was developed based on a modular architecture that shares one set of instrumentation and two sets of antenna probes for five different operation modes without the need of changing the setup. This novel configuration enables a flexible, unique, and cost-effective solution for mm-Wave applications that operate from 75 GHz to 110 GHz. The proposed scanner includes a visual interface that guarantees autonomous operation permitting accurate measurements in all operational modes. The scanner was implemented and validated using different mm-Wave components, providing highly accurate measurements for each mode. Measured results for near-field, far-field, material and radome tests present excellent agreement with simulation results.
The manifold matrix of the received signals can be destroyed when the array is with the gain and phase errors,which will affect the performance of the traditional direction of arrival(DOA)estimation *** this paper,a n...
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The manifold matrix of the received signals can be destroyed when the array is with the gain and phase errors,which will affect the performance of the traditional direction of arrival(DOA)estimation *** this paper,a novel active array calibration method for the gain and phase errors based on a cascaded neural network(GPECNN)was *** cascaded neural network contains two parts:signal-to-noise ratio(SNR)classification network and two sets of error estimation *** calibration subnetworks are activated according to the output of the SNR classification network,each of which consists of a gain error estimation network(GEEN)and a phase error estimation network(PEEN),*** disadvantage of neural network topology architecture is changing when the number of array elements varies is addressed by the proposed group calibration ***,due to the data characteristics of the input vector,the cascaded neural network can be applied to arrays with arbitrary geometry without repetitive *** results demonstrate that the GPECNN not only achieves a better balance between calibration performance and calibration complexity than other methods but also can be applied to arrays with different numbers of sensors or different shapes without repetitive training.
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