[go: up one dir, main page]
Skip to main content
We gratefully acknowledge support from the Simons Foundation, member institutions, and all contributors. Donate
arXiv logo
Cornell University Logo

Astrophysics > Instrumentation and Methods for Astrophysics

arXiv:1406.2585 (astro-ph)
[Submitted on 10 Jun 2014 (v1), last revised 31 Aug 2015 (this version, v2)]

Title:A Resistive Wideband Space Beam Splitter

Authors:Nivedita Mahesh, Ravi Subrahmanyan, N. Udaya Shankar, Agaram Raghunathan
View PDF
Abstract:We present the design, construction and measurements of the electromagnetic performance of a wideband space beam splitter. The beam splitter is designed to power divide the incident radiation into reflected and transmitted components for interferometer measurement of spectral features in the mean cosmic radio background. Analysis of a 2-element interferometer configuration with a vertical beam splitter between a pair of antennas leads to the requirement that the beam splitter be a resistive sheet with sheet resistance {\eta}o /2, where {\eta}o is the impedance of free space. The transmission and reflection properties of such a sheet is computed for normal and oblique incidences and for orthogonal polarizations of the incident electric field. We have constructed such an electromagnetic beam splitter as a square soldered grid of resistors of value 180 Ohms (approximately {\eta}o /2) and a grid size of 0.1 m, and present measurements of the reflection and transmission coefficients over a wide frequency range between 50 and 250 MHz in which the wavelength well exceeds the mesh size. Our measurements of the coefficients for voltage transmission and reflection agree to within 5% with physical optics modeling of the wave propagation, which takes into account edge diffraction.
Comments: 14 pages,17 figures
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Optics (physics.optics)
Cite as: arXiv:1406.2585 [astro-ph.IM]
  (or arXiv:1406.2585v2 [astro-ph.IM] for this version)
  https://doi.org/10.48550/arXiv.1406.2585

Submission history

From: Nivedita Mahesh [view email]
[v1] Tue, 10 Jun 2014 15:19:03 UTC (1,625 KB)
[v2] Mon, 31 Aug 2015 18:37:24 UTC (2,173 KB)
Full-text links:

Access Paper:

view license
Current browse context:
astro-ph.IM
< prev   |   next >
new | recent | 2014-06
Change to browse by:
astro-ph
physics
physics.optics

References & Citations

export BibTeX citation

Bookmark

BibSonomy logo Reddit logo

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
Papers with Code (What is Papers with Code?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)