Questions tagged [antenna]

Questions about devices which collect and couple electromagnetic signals (communications, radar or other electromagnetic measurements) directly between free space, and conductors (e.g. waveguides or other transmission lines).

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Are LHCP L-Band antennas for Cubesats available?

I am designing a cubesat to carry out GNSS reflectometry or GNSS-R. To collect the earth reflected signals, I need a nadir pointing array of patch antennas, with Left Hand Circular Polarisation (LHCP) ...
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Was Dart antenna tested using a DSN antenna located in Australia?

So recently a tweet by a bot which tracks communications by the Deep Space Network stated that: DSS 43 receiving data from Double Asteroid Redirection Test at 312.5kb/s. IN LOCK IN LOCK 1 TURBO 11:11 ...
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What are the electrical requirements of the antennas used in Starlink?

My interest is in both the antenna for the ground segment (the "UFO on a stick") and the antennas for the space segment (phased arrays if I'm not mistaken). I couldn't find around much more ...
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Did any of Voyagers' receivers' front ends take advantage of the "cold of space" to lower noise? (communications or radio/plasma science receivers)

Most of the Voyagers' electronics are kept warm by electrical heaters powered by their RTG's, and presumably protected by some amount of insulation from the "cold of space" which means loss ...
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How would the antenna on a spacecraft in GEO be provided an electrical ground?

I would like to understand better what specifications or guidelines address the electrical grounding/Earthing a parabolic reflector Antenna in GEO to minimize the potential difference with respect to ...
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What is the Telescope Invariant Point?

I am working on an implementation of an SLR tool. At some points of the documentation of the CRD format the term telescope invariant point shows up. Apparently it's a point on an ILRS antenna system. ...
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Why does this "satellite antenna at the Laguna Peak Tracking and Injection Facility" look so weird? (two dishes back-to-back)

The video 1967 Navy Satellite Navigation training film (IBM 7094 data center) after 11:57 (older version here) the narrator says: For every pound of satellite in ...
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Field of view from Antenna

I am trying to calculate the revisit rate for my satellite constellation. My satellite hosts software-defined radios as its payload. Hence, I need to find the field of view from antenna. My S-band ...
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Antenna for receivers

I am designing a CubeSat 6U in which I am using Software Defined Radio with SIGINT capability as my payload. The payload has 3 reception ports and 2 transmission ports and hence transceiver or ...
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How is this video projection screen is used in tests of Europa Clipper's high gain antenna?

Phys.org's Europa Clipper high-gain antenna undergoes testing says: The full-scale prototype antenna, which at 10 feet (3 meters) tall is the same height as a standard basketball hoop, is in the ...
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Was there a prototype for Solar Probe's hybrid Heat Shield/Antenna?

An early concept of the Solar Probe (reborn as Solar Probe Plus then Parker Solar Probe) used a parabolic antenna with a heat-resistant nadir facing side to double as a heat shield. While sourcing ...
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Are there any selfies of Curiosity or Perseverance with their high gain antenna deployed and "looking up"?

The Curiosity and Perseverance rovers have high gain antenna arrays on a mechanical arm that can rise up and point towards Earth and communicate directly. Has the Curiosity rover ever communicated ...
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Transmission and Receiving Rate of a X-Band Antenna

What would be a typical transmission and reception rate range for a X-Band Low Gain Antenna for say 300Km from an orbiter? I figured a High Gain Antenna would be difficult to use since it requires ...
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Antenna required to reach titan

There are two 12U cubesats, one in Earth orbit and one in orbit around Titan. They have a transmit power of 700 W (for short periods) and have identical antennas. What diameter and what type of ...
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Relation between beamwidths of E-plane and H-plane

Is there any relation between E-plane and H-plane beamwidths of an antenna when steering in azimuth and elevation directions?
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