Practical Noise Model of an Active Electronically Scanning Array
Active electronically scanning arrays are now widely used in radar and communication systems. The noise characteristics are critical to the system signal-to-noise ratio, thus modeling of the antenna array noise is useful. In this paper, a two-port noise model of an active electronically scanning arr...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-01-01
|
| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2023/1633484 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832549757909729280 |
|---|---|
| author | Jian Mi Kan Wang Zhao Li Hongbing Sun |
| author_facet | Jian Mi Kan Wang Zhao Li Hongbing Sun |
| author_sort | Jian Mi |
| collection | DOAJ |
| description | Active electronically scanning arrays are now widely used in radar and communication systems. The noise characteristics are critical to the system signal-to-noise ratio, thus modeling of the antenna array noise is useful. In this paper, a two-port noise model of an active electronically scanning array is presented, which is more practical than the model in previous publications. In this model, an antenna array with a multistage combiner network is equivalent to a one-stage combiner network, thus the calculation of the noise figure is greatly simplified. Since the model is based on measurable parameters, it can be applied directly to the design of electronically scanning arrays. The noise model of a spaceborne synthetic aperture radar antenna system is displayed for example. Some useful conclusions are got about the noise figure for tapered antenna arrays. For a weighted antenna array with taper efficiency εT, if the gain of low noise amplifiers is sufficiently large, the noise figure of the antenna array is increased by 1/εT, compared to a uniformly weighted array. Besides, the deterioration of the signal-to-noise ratio for a tapered antenna array system originates from the increase of antenna noise temperature, rather than the decrease of antenna aperture gain. |
| format | Article |
| id | doaj-art-e19e013025754da19d9e4c6685c09cfb |
| institution | Kabale University |
| issn | 1687-5877 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-e19e013025754da19d9e4c6685c09cfb2025-02-03T06:08:39ZengWileyInternational Journal of Antennas and Propagation1687-58772023-01-01202310.1155/2023/1633484Practical Noise Model of an Active Electronically Scanning ArrayJian Mi0Kan Wang1Zhao Li2Hongbing Sun3Nanjing Research Institute of Electronics TechnologyNanjing Research Institute of Electronics TechnologyNanjing Research Institute of Electronics TechnologyNanjing Research Institute of Electronics TechnologyActive electronically scanning arrays are now widely used in radar and communication systems. The noise characteristics are critical to the system signal-to-noise ratio, thus modeling of the antenna array noise is useful. In this paper, a two-port noise model of an active electronically scanning array is presented, which is more practical than the model in previous publications. In this model, an antenna array with a multistage combiner network is equivalent to a one-stage combiner network, thus the calculation of the noise figure is greatly simplified. Since the model is based on measurable parameters, it can be applied directly to the design of electronically scanning arrays. The noise model of a spaceborne synthetic aperture radar antenna system is displayed for example. Some useful conclusions are got about the noise figure for tapered antenna arrays. For a weighted antenna array with taper efficiency εT, if the gain of low noise amplifiers is sufficiently large, the noise figure of the antenna array is increased by 1/εT, compared to a uniformly weighted array. Besides, the deterioration of the signal-to-noise ratio for a tapered antenna array system originates from the increase of antenna noise temperature, rather than the decrease of antenna aperture gain.http://dx.doi.org/10.1155/2023/1633484 |
| spellingShingle | Jian Mi Kan Wang Zhao Li Hongbing Sun Practical Noise Model of an Active Electronically Scanning Array International Journal of Antennas and Propagation |
| title | Practical Noise Model of an Active Electronically Scanning Array |
| title_full | Practical Noise Model of an Active Electronically Scanning Array |
| title_fullStr | Practical Noise Model of an Active Electronically Scanning Array |
| title_full_unstemmed | Practical Noise Model of an Active Electronically Scanning Array |
| title_short | Practical Noise Model of an Active Electronically Scanning Array |
| title_sort | practical noise model of an active electronically scanning array |
| url | http://dx.doi.org/10.1155/2023/1633484 |
| work_keys_str_mv | AT jianmi practicalnoisemodelofanactiveelectronicallyscanningarray AT kanwang practicalnoisemodelofanactiveelectronicallyscanningarray AT zhaoli practicalnoisemodelofanactiveelectronicallyscanningarray AT hongbingsun practicalnoisemodelofanactiveelectronicallyscanningarray |