Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!tut.cis.ohio-state.edu!att!cbnews!military From: lewis@saint (Keith Lewis) Newsgroups: sci.military Subject: Re: Anti-radiation missle capabilities? Message-ID: <1990Aug28.043231.634@cbnews.att.com> Date: 28 Aug 90 04:32:31 GMT References: <1990Aug21.024249.220@cbnews.att.com> <1990Aug23.014546.1679@cbnews.att.com> Sender: military@cbnews.att.com (William B. Thacker) Organization: The MITRE Corporation, McLean, VA Lines: 27 Approved: military@att.att.com Full-Name: Usenet News From: lewis@saint (Keith Lewis) In article <1990Aug21.024249.220@cbnews.att.com> Will Martin writes: >Can anti-radiation missiles, which usually are used against radars operating >in the UHF or microwave range, be used against targets emitting lower >frequencies, like HF radio? Could such a missile be used to home in on the >antenna of a transmitter being used to jam shortwave broadcast reception, >for example? In order to home in on a transmitting antenna, the missile needs a recieving antenna (or three) of its own. The size of a given design of antenna is some fraction (preferably 1) of the wavelength (inversly proportional to the frequency) of the broadcast you want to home in on. Radar is measured in centimeters. HF is measured in meters. So for *Optimal* design, you would make the antennae a number of meters in size. Whether you really need this optimization I can't say. There may be other designs that are effective, or maybe the radar antennae will work *well enough* to take out a powerful transmitting antenna. -- Keith Lewis Saddam Hussein says he would pull out of Kuwait, but Islamic law prohibits him. "That would be Kuwaitis interruptus!"