Dave, it is a lot easier to limit voltage than power. It shouldn't be too difficult to build a diode voltage clamp for 100 mw @ 50 ohms @400 MHz. It would probably be a bit lossy at lower power levels but probably less then 3.5 db. Check with some of the detector manufactures. They could probably make you one in a SMA package.
You also might like to explore limiting power at the transmitter as well. Fred townsend DC to Light [email protected] wrote: I am looking for a solution to a safety issue with a RF transmitter, where we need to physically limit the maximum RF power fed to the antenna, to around 100mW @ around 400 MHz. Is anyone aware of a (preferably small) device that can be inserted between a handset and its antenna, using SMA style connectors? Most of the RF limiters I have googled are quite large as intended for high powers. Any help appreciated, Best Regards, Dave Coleman AIIRSM SELEX Communications Ltd. Signal House, Grange Road Christchurch Dorset BH23 4JE * +44 (0)1202 404200 Mobile +44 (0)787 9652126 Fax +44 (0)1202 404921 * [email protected] “Usually I try to take it one day at a time, but lately several have attacked me at once...” ------------------------------------------------------------ This email and any attached files contains company confidential information which may be legally privileged. It is intended only for the person(s) or entity to which it is addressed and solely for the purposes set forth therein. If you are not the intended recipient or have received this email in error please notify the sender by return, delete it from your system and destroy any local copies. It is strictly forbidden to use the information in this email including any attachment or part thereof including copying, disclosing, distributing, amending or using for any other purpose. In addition the sender excludes all liabilities (whether tortious or common law) for damage or breach arising or related to this email including but not limited to viruses and libel. SELEX Communications Limited is a Private Limited Company registered in England and Wales under Company Number 964533 and whose Registered Office is Lambda House, Christopher Martin Rd, Basildon, SS14 3EL. England. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
