One word of caution...Depending on your proximity to digi stuff - you WILL pick up noise on your antenna that can severely limit your range. Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Pager/Short Message: 3032042974@xxxxxxxx Email: charles.grasso@xxxxxxxxxxxx; Email Alternate: chasgrasso@xxxxxxxx -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Murez, Zachary J. Sent: Friday, September 23, 2005 1:06 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] PCB Trace Antenna I need to design a PCB trace antenna. I would like it to be centered (peak) about 20 MHz with a range of about 100 kHz to 200 MHz. I have spent hours searching online and can not find the information I need. I would like to calculate the impedance of a microstrip trace routed in a loop. The outside layer will be 1 oz finished (1.378 mils thick). The minimum trace width is 4 mils. The spacing to the next layer is 12 mils and will be a solid ground plane. I could void the area under the antenna if needed. The loop will be around a hole in the board that has a diameter of 0.720". The antenna could have a couple revolutions around the hole if needed. Thanks in advance for any help. Zach ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: =20 http://www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: http://www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu