Design Equations for a Closely-Spaced Two-Element Interferometer Including Internal Noise Coupling
We present design equations for a two-element closely-spaced interferometer for measuring the noise temperature of a uniform sky. Such an interferometer is useful for observing highly diffuse radio sources such as the Milky Way and Cosmological signals. We develop a simple equivalent circuit base...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/86268 |
| _version_ | 1848764801020329984 |
|---|---|
| author | Sutinjo, Adrian McKinley, Benjamin Belostotski, Leonid Ung, Daniel CX Thekkeppattu, Jishnu N |
| author_facet | Sutinjo, Adrian McKinley, Benjamin Belostotski, Leonid Ung, Daniel CX Thekkeppattu, Jishnu N |
| author_sort | Sutinjo, Adrian |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present design equations for a two-element closely-spaced interferometer
for measuring the noise temperature of a uniform sky. Such an interferometer is
useful for observing highly diffuse radio sources such as the Milky Way and
Cosmological signals. We develop a simple equivalent circuit based on
radiophysics and antenna theory to describe the interactions between key design
parameters such as antenna self and mutual impedance and noise parameters of
the receiver; the latter is considered internal noise. This approach
straightforwardly facilitates design studies as the response of the uniform
signal and the systematic error due to internal noise coupling can be analyzed
using the same equivalent circuit. The equivalent circuit shows that mutual
coherence due to internal noise coupling is non-negligible and an inherent
property of a closely-spaced interferometer. A realistic example design
involving two closely-spaced horizontal dipoles over a lossy ground for
Cosmological signal detection from 50 to 100 MHz is discussed as an
illustration. |
| first_indexed | 2025-11-14T11:25:07Z |
| format | Journal Article |
| id | curtin-20.500.11937-86268 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:25:07Z |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-862682021-11-10T03:23:53Z Design Equations for a Closely-Spaced Two-Element Interferometer Including Internal Noise Coupling Sutinjo, Adrian McKinley, Benjamin Belostotski, Leonid Ung, Daniel CX Thekkeppattu, Jishnu N astro-ph.IM astro-ph.IM We present design equations for a two-element closely-spaced interferometer for measuring the noise temperature of a uniform sky. Such an interferometer is useful for observing highly diffuse radio sources such as the Milky Way and Cosmological signals. We develop a simple equivalent circuit based on radiophysics and antenna theory to describe the interactions between key design parameters such as antenna self and mutual impedance and noise parameters of the receiver; the latter is considered internal noise. This approach straightforwardly facilitates design studies as the response of the uniform signal and the systematic error due to internal noise coupling can be analyzed using the same equivalent circuit. The equivalent circuit shows that mutual coherence due to internal noise coupling is non-negligible and an inherent property of a closely-spaced interferometer. A realistic example design involving two closely-spaced horizontal dipoles over a lossy ground for Cosmological signal detection from 50 to 100 MHz is discussed as an illustration. Journal Article http://hdl.handle.net/20.500.11937/86268 10.46620/20-0017 fulltext |
| spellingShingle | astro-ph.IM astro-ph.IM Sutinjo, Adrian McKinley, Benjamin Belostotski, Leonid Ung, Daniel CX Thekkeppattu, Jishnu N Design Equations for a Closely-Spaced Two-Element Interferometer Including Internal Noise Coupling |
| title | Design Equations for a Closely-Spaced Two-Element Interferometer
Including Internal Noise Coupling |
| title_full | Design Equations for a Closely-Spaced Two-Element Interferometer
Including Internal Noise Coupling |
| title_fullStr | Design Equations for a Closely-Spaced Two-Element Interferometer
Including Internal Noise Coupling |
| title_full_unstemmed | Design Equations for a Closely-Spaced Two-Element Interferometer
Including Internal Noise Coupling |
| title_short | Design Equations for a Closely-Spaced Two-Element Interferometer
Including Internal Noise Coupling |
| title_sort | design equations for a closely-spaced two-element interferometer
including internal noise coupling |
| topic | astro-ph.IM astro-ph.IM |
| url | http://hdl.handle.net/20.500.11937/86268 |