Doesn't a circularly polarized antenna actually accept more noise? I mean if you have a vertically polarized antenna than horizontal noise is reduced by 20db and vice versa. Whereas, there is no such penalty for a circularly polarized antenna regarding vertically and horizontally polarized noise. In fact, only the opposite circularly polarized patten has a penalty.
-Matt On Apr 5, 2010, at 5:32 PM, Cameron Crum wrote: > Actually, Mike I like your original idea about circularly polarized > antennas for these bands. They are by nature, very broadband, and don't > need to be extremely big. At these frequencies, propagation is so much > better, that you wouldn't super high gain...and probably wouldn't want > it. Besides that, the circ. pol will help filter out a lot of the > unwanted noise. > > Cameron > > On 4/5/2010 12:27 PM, Mike wrote: >> Think innovation. Remove or move a segment of a certain element design and >> you've modified the resonant frequency. With things I have in my barn I >> could design and build a turnstile with tunable elements. Think trombone >> with specific markings. Broadband antennas by design need be larger than an >> antenna designed for a specific segment. From everything I know about >> antenna design, this is NOT a deal breaker. >> >> Friendly Regards, >> >> Mike >> >> Mike Gilchrist >> Disruptive Technologist >> Advanced Wireless Express >> P.O. Box 255 >> Toledo, IA 52342 >> 239.770.6203 >> [email protected] >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Mike Hammett >> Sent: Monday, April 05, 2010 12:10 PM >> To: WISPA General List >> Subject: Re: [WISPA] WISPA TV Whitespaces Meeting with the FCC >> >> While it wouldn't need to cover the entire range, I'd expect at a most >> separate UHF and VHF antenna... otherwise you're way too specific and would >> >> need to stock too many different antenna models. >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> >> -------------------------------------------------- >> From: "Mike"<[email protected]> >> Sent: Monday, April 05, 2010 8:23 AM >> To: "'WISPA General List'"<[email protected]> >> Subject: Re: [WISPA] WISPA TV Whitespaces Meeting with the FCC >> >> >>> Awesome report! Thanks. >>> Give me equipment capable of 20 watts, circularly polarized sectors, a >>> turnstile antenna on the CPE, and it would be a perfect fit for THIS rural >>> market. At that power level, and circular polarization, I could reuse any >>> channel on the same tower using opposite circular sense. I know some of >>> the >>> discussion in the past on this list led some to believe an antenna would >>> look like a big TV log periodic, but it just isn't so. A TV antenna is by >>> necessity a broadband device, and as such is BIG to handle a RANGE of >>> frequencies. A turnstile or other narrow band antenna could be built to >>> blend with the aesthetics of a home or business. Heck, if this comes to >>> pass, I may go into the antenna building business just for this usage. >>> >>> Friendly Regards, >>> >>> Mike >>> >>> Mike Gilchrist >>> Disruptive Technologist >>> Advanced Wireless Express >>> P.O. Box 255 >>> Toledo, IA 52342 >>> 239.770.6203 >>> [email protected] >>> >>> -----Original Message----- >>> From: [email protected] [mailto:[email protected]] On >>> Behalf Of Steve Barnes >>> Sent: Monday, April 05, 2010 7:41 AM >>> To: WISPA General List >>> Subject: Re: [WISPA] WISPA TV Whitespaces Meeting with the FCC >>> >>> This is a great report good job guys and thank you. >>> >>> Next question. I don't know any of the team personally just from your >>> posts. The picture in the report, can you give us a who's who left to >>> right. >>> >>> Steve Barnes >>> RC-WiFi Wireless Internet Service >>> >>> -----Original Message----- >>> From: [email protected] [mailto:[email protected]] On >>> Behalf Of Jack Unger >>> Sent: Saturday, April 03, 2010 7:17 PM >>> To: [email protected]; WISPA General List >>> Subject: [WISPA] WISPA TV Whitespaces Meeting with the FCC >>> >>> Last Wednesday, March 31, the WISPA FCC Committee assisted by the WISPA >>> Promotions Committee met with top managers of the FCC Office of >>> Engineering >>> and Technology (OET) at FCC Headquarters in Washington D.C. >>> to discuss the status of WISPA's TV Whitespaces filings. >>> >>> The following Members represented WISPA. Ryan Spott, Alex Phillips, John >>> Scriver, and Jack Unger. The WISPA Team was assisted by Steve Coran of >>> Rini/Coran LLC in Washington. >>> >>> All Team Members made valuable contributions to the effort and we all feel >>> that the meeting went well. Our goal was to ask the FCC take favorable >>> action soon on WISPA's Petitions to adjust the TV Whitespace rules by >>> making >>> corrections to several problem areas, thereby making WISP use of the >>> Whitespaces more practical and more successful. >>> >>> I'm attaching a more detailed report (.doc file) and also the official >>> written filing (PDF) that WISPA is required to make after every meeting >>> with >>> the FCC. A copy of our FCC PowerPoint presentation is also required to be >>> part of our written filing. To easily view our presentation, please rotate >>> the attached PDF clockwise 90 degrees in your Adobe Reader viewer. >>> >>> Your questions and constructive suggestions are always welcome. >>> >>> Respectfully Submitted, >>> >>> Jack Unger >>> WISPA FCC Committee Chair >>> 818-227-4220 >>> >>> -- >>> Jack Unger - President, Ask-Wi.Com, Inc. >>> Network Design - Technical Training - Technical Writing Serving the >>> Broadband Wireless, Networking and Telecom Communities since 1993 >>> www.ask-wi.com 818-227-4220 [email protected] >>> >>> >>> >>> >>> >>> >>> >>> >> ---------------------------------------------------------------------------- >> >>> ---- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> >>> >> ---------------------------------------------------------------------------- >> >>> ---- >>> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >>> >>> >>> >>> >>> >> ---------------------------------------------------------------------------- >> ---- >> >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> >>> >> ---------------------------------------------------------------------------- >> ---- >> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> >> ---------------------------------------------------------------------------- >> ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
