Well it will still see the H and V pol but at reduced gain. The main advantage would be to use as you suggest...opposite pols for greater frequency reuse.
Cameron On 4/5/2010 4:41 PM, Matt Liotta wrote: > 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/ > > > -------------------------------------------------------------------------------- WISPA Wants You! 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