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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2509.17242 |
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| _version_ | 1866918145461059584 |
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| author | Lai, Mark MacKay, Vincent Wulf, Dallas Shmerko, Peter Belostotski, Leonid |
| author_facet | Lai, Mark MacKay, Vincent Wulf, Dallas Shmerko, Peter Belostotski, Leonid |
| contents | This paper presents a low-noise amplifier (LNA) that was developed for a new radio telescope comprised of 512 parabolic dish antennas. The LNA closely interfaces to a custom-made antenna feed with an impedance co-designed to provide noise matching over a 5:1 bandwidth. Additionally, a method of broadband noise and power matching that allows the input impedance to be controlled independently from the optimum signal-source impedance to achieve minimum noise is also discussed. When measured in a 50-Ωsystem, the LNA exhibits a return loss (RL) of > 8 dB between 0.32 to 1.5 GHz, S21 of 32 dB \pm 1.2 dB, IP1dB > -37 dBm, and IIP3 > -20 dBm. Noise parameter measurements show Tmin \approx 13 \pm 4K and noise temperatures T50Ω \approx 18 \pm 6K between 0.5 to 1.4 GHz. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_17242 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 0.3-to-1.5-GHz LNA with Wideband Noise and Power Matching for Radio Astronomy Lai, Mark MacKay, Vincent Wulf, Dallas Shmerko, Peter Belostotski, Leonid Instrumentation and Methods for Astrophysics This paper presents a low-noise amplifier (LNA) that was developed for a new radio telescope comprised of 512 parabolic dish antennas. The LNA closely interfaces to a custom-made antenna feed with an impedance co-designed to provide noise matching over a 5:1 bandwidth. Additionally, a method of broadband noise and power matching that allows the input impedance to be controlled independently from the optimum signal-source impedance to achieve minimum noise is also discussed. When measured in a 50-Ωsystem, the LNA exhibits a return loss (RL) of > 8 dB between 0.32 to 1.5 GHz, S21 of 32 dB \pm 1.2 dB, IP1dB > -37 dBm, and IIP3 > -20 dBm. Noise parameter measurements show Tmin \approx 13 \pm 4K and noise temperatures T50Ω \approx 18 \pm 6K between 0.5 to 1.4 GHz. |
| title | 0.3-to-1.5-GHz LNA with Wideband Noise and Power Matching for Radio Astronomy |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2509.17242 |