Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [radar]

18 questions
2
votes
3 answers

Radar/Lidar for detection of humans in an indoor room

I have a room (a waiting room) about 10x10 meters and I would like to locate people in there. The ceiling in the room is really high, so I can place a radar above in any height I want. My questions: Is it possible to use some ready/made radar/lidar…
matousc
  • 147
  • 6
1
vote
1 answer

A radar that is not an OTH detection distance

Let's say that we have a radar that is not an OTH on a boat, and it is placed 30 meters above the ground. Is there a way for it to detect an offshore platform 152 kilometers away from it, since the Earths curvature should prevent it from doing…
pavle
  • 111
  • 1
0
votes
0 answers

Where does the radar technology stand?

This month at the IDEAS 2024 defense exhibition, Pakistani state-owned company NRTC and a private company, BlueSurge, have unveiled their new surveillance radar, AM-350S. The following are some features of the radar: NRTC AM-350S Long-Range 3D Air…
user366312
  • 127
  • 6
0
votes
1 answer

Relationship between antenna length and wavelength in radar

This is a question about radar design and how it works, because I'm trying to figure out some elements that are unclear to me. My understanding so far is that to detect an objet with a given size, the signal emitted by the radar needs to have…
totalMongot
  • 161
  • 1
  • 7
0
votes
1 answer

Is it possible to build a radar that is shielded behind one meter of ceramic material and still detect people 500 meters away?

I saw that there are radars which can detect people behind walls, so I wonder what the limitations of radars are when it comes to detecting people while being protected behind thick ceramic shield.
eleanor
  • 1
0
votes
1 answer

Optimal frequency for penetrating 1 meter of water using radio waves?

We are attempting to penetrate 1m of water featuring dissolved ions ( assume salinity of sea water) using radio waves. Aside for using wavelengths of very low frequency radio or below, what would be the best frequency for achieving this task?
Hypnos Stratagem
  • 371
  • 5
  • 12
0
votes
1 answer

Rotation of Radar Axis in 3D plane

I'm working on a sensor fusion application. In our vehicle, 4 radars (fixed, non-rotating radars) are placed at 4 corners of the vehicles at 45 degrees with respect to x, y and z-axes of the vehicle. For proper working of the sensor-fusion algorithm…
Akash Sagar
  • 21
  • 2
0
votes
0 answers

What kind of low-cost equipment do I need to learn and experiment with RADAR at home?

I am interested in RADARs. However, I don't have enough time to go to school for studying RADARs. Therefore, I am thinking about self-study. What kind of low-cost equipment do I need to learn and experiment with RADAR technology at my home?
user366312
  • 127
  • 6
0
votes
0 answers

How to design the range and precision of a radar?

I would like to design the wave characteristics and size of antenna for a radar, but I am quite confused about how to find this information. The radar should have roughly following capabilities: Range: up to 5 miles Precision: objects of 0.5m to 5…
totalMongot
  • 161
  • 1
  • 7
0
votes
1 answer

What are design considerations for an RCS test range be relocated fully underground?

Sites like the Lockheed Helendale RCS or the Tonopah test range are only known to have an underground pit to support raising or lowering of test articles. But is it technically possible to have a fully underground test range? For example the…
Nederealm
  • 125
  • 3
0
votes
2 answers

How to get correct yaw and pitch after rotation

I am trying to come up with a "stabilization" algorithm for an antenna dish. The dish can move in the azimuth (yaw) and elevation (pitch) directions. But the boat it is mounted to, moves in all three degrees (yaw pitch and roll). To start with, I am…
rperez62
  • 1
0
votes
1 answer

How do "Your Speed" Signs work, and how do vehicles know when it's the sign's turn to display their speed?

I see these LED speed signs on the side of the road, which display the approaching vehicle's speed. What I have gathered is that they measure the time between the sending and receiving of the signals and then convert it into distance. My questions…
Ritika Das
  • 1
  • 1
0
votes
1 answer

can I extend the the antenna of a magnetron with a cable?

If I connect a piece of heavy copper wire or copper rod to the antenna cap of a magnetron can I guide the current so that microwaves would be emitted further away ?
Manu de Hanoi
  • 285
  • 2
  • 10
0
votes
0 answers

Aspect Angles in 3D (Radar Cross Sectional Area)

a bit confused with regards to the whole term aspect angle in a 3D planar case. Most examples that I searched online involved either a 2D plane or a stationary object. Let say the black circle denotes a ball that flies in a projectile motion as…
THW
  • 1
0
votes
1 answer

Can a piece of conductor be made invisible to radar by overdamping?

To my understanding every conductor reemits a bit of electromagnetic waves induced in it by radiation. If theres a way in an antenna one could create a wave of opposite phase to the incident one so that there's no net oscillating field, could it…
Francis L.
  • 378
  • 2
  • 13
1
2