Timerover51
SOC-14 5K
I don't have it in front of me, but I thought that MT Radar was variable and multi-frequency to resist Jamming. The TL 5 Radar is not HISTORIC Radar from TL 5, it is near future Radar built using TL 5 technology.
Radar does require an antenna, specifically shaped and sized to the frequency being used. Unless you are totally tossing out Real World physics, the laws governing radio waves are the same in MegaTraveller as the Real World. An antenna designed for the 1.5 meter wavelength is not going to work real well with a frequency of 50cm and will not work at all at a frequency of 10cm or 3cm. Trying to use an antenna designed for the 3cm frequency for a frequency of 1.5 meters is quite impossible. By the way, the MegaTraveller design sequence for Radar has nothing devoted to antennas. Take a look at long-range aircraft warning radar domes on what used to be the DEW line for an idea of the size of the antenna. The designers of the game cannot plead ignorance about the need for radar antennas.
The three jammers carried by the B-29 each covered a different frequency range. The tubes or magnetrons that produce the radio waves that are used by the radar are designed to operate at specific frequencies and wavelengths. A magnetron designed to produce 10cm radio waves cannot produce 3cm radio waves and vice versa.
Take a look at Norm Friedman's book on Naval Radar for a very good coverage of radar development up to the early 1970s.
Go here for an idea as to the different antennas required for different frequencies.
http://www.ibiblio.org/hyperwar/USN/ref/Radar/index.html
Here is the principal U.S. Night Fighter radars, which also includes some cost data.
http://www.ibiblio.org/hyperwar/USN/ref/NightFighterRadars/index.html
A small point, but TL 5 is probably closer to WW1. Radar in WW2 was more like a TL 6 prototype.
The MegaTraveller Referee's Companion on page 26 states that Tech Level 5 is equivalent to 1930, while Tech Level 6 is equivalent to 1950. On page 28 in the same volume, on Technology Chart 1, Radar is specifically cited as a Tech Level 5 technology.
The basic radar frequencies have not changed that much since World War 2, nor have the design of antennas, what has changed is the amount of processing done to the signal when it is received back at the radar. The primary difference is the use of phase-array radar, which uses thousands of radar tubes to produce a steerable beam, and requires a lot amount of computing power. It is also highly vulnerable to damage, and does require a lot of power.
I also have a very large problem with some of the weaponry Tech Levels, and again, the designers should have known better.
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