The MTI 5GHz dual-pol sectors we bought were around $600 if I remember correctly.
> Interesting. I wasn't saying that it isn't hard. > > Some manufacturers have found easy and cost effective ways to make Dual > Pol > antennas. But I'm guessing there could be some intelectual property patent > issues, or anyone to do it? > > But there has to be some savings attributed to shared costs such as ... > mounts, case, shipping costs, overhead, distributor markup, R&D. These > things are all a tangable cost that goes toward the cost of a single pol > antenna, and are not increased when the inside of the antenna design gets > modified to be DP. I'd be intereted in what percentage of a single pol > antenna cost is for the above 4 things compared to the element itself. > > Truthfully, we have come a long way with DP design and price for > parabolics > and subscriber panels. > > What realy confuses me is, why manufacturers still can;t come up with a > low > cost DP AP sector antenna? > > Its ironic as heck, that trango can sell an entire AP radio and int DP > sector antenna, for less than third parties sell a single DP sector > antenna > by itself. > > Thats still the missing peice of the puzzle in 5.x Ghz DP. > > Its Ironic as heck... Titltek can make a 4ft 900Mhz dual pol 90deg for > under > $700. But can't find a < 2ft 5.x Ghz Dp 90 for less than a grand. > The last few I did, I took my old Trango 5800s, drill holes in them for > the > pigtails, took out the SBC, and used them for the antenna. It was cheaper > than buying an antenna. > > A couple vendors have represented that they can make them. But I don't see > part numbers listed. I'd love to see these in the sub $300 range. > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Chuck McCown - 3" <[EMAIL PROTECTED]> > To: "WISPA General List" <wireless@wispa.org> > Sent: Saturday, September 27, 2008 11:30 AM > Subject: Re: [WISPA] Dual Pol Antennas > > >>A dual pol panel antenna can be an order of magnitude more difficult to >>make >> than a single linear polarized antenna. Almost all panel antennas are >> either an array of patches or an array of butterfly dipole elements over >> a >> ground plane. Most designers are trying to put as much gain in the area >> as >> they can. The means the feed network and driven elements are crammed in >> so >> close together that you suffer some degradation. To make a dual pol >> patch >> you have to use a square patch. That already is less than optimum. >> Then >> you have to produce a second feed mechanism for feeding the second feed >> point on all the patches. That means other layers and intermediate >> ground >> planes etc. Not easy at all. >> >> ----- Original Message ----- >> From: "Tom DeReggi" <[EMAIL PROTECTED]> >> To: "WISPA General List" <wireless@wispa.org> >> Sent: Saturday, September 27, 2008 9:49 AM >> Subject: Re: [WISPA] Dual Pol Antennas >> >> >>> Drew, >>> >>> Who sells/stocks it? >>> >>> I also saw someone was selling what looked like the MTI Dual pol 25dbi >>> for >>> about $200, I think it was wlanparts.com. Thats starting to get >>> affordable. >>> >>> I'm fine with Dual Pol dishes for $225, its a lot of metal. Plus there >>> usually needed for more critical links. Also used more often on tower >>> sites >>> where I get charge per antenna. >>> However, when a standard panel is only $50, it can't be that more >>> expensive >>> to add a couple more elements for the second pol. >>> Clearly a lot of markup fat in the price model. I think there is a >>> huge >>> market for the dual pol Panels at sub $150, but at $250, a WISP really >>> has >>> to think about whether its worth their while, when they can just >>> install >>> two >>> single pol antennas side by side. Expecially if isntalled on customer >>> roofs >>> where there aren;t colo fees. I see no reasons that the smaller gain >>> panels >>> couldn't be made and sold for sub $125. Don't get me wrong, its still >>> good >>> news to learn of new DP panels available as option. Trango also has >>> their >>> external model, but its about $300. >>> >>> Tom DeReggi >>> RapidDSL & Wireless, Inc >>> IntAirNet- Fixed Wireless Broadband >>> >>> >>> ----- Original Message ----- >>> From: "Drew Lentz" <[EMAIL PROTECTED]> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Friday, September 26, 2008 6:58 PM >>> Subject: Re: [WISPA] Dual Pol Antennas >>> >>> >>>>A product I really like for dual-pole is the Mars WA56-DP25N. It's a >>>> pretty inexpensive panel from 4.9 - 5.875 @ 25dBi .. There are 2 >>>> versions, 1 is the antenna alone, the other is with an enclosure. Its >>>> ~ >>>> $260. I know its not $150, but its not too bad! >>>> >>>> -d >>>> >>>> >>>> On Sep 25, 2008, at 10:04 PM, Mike Brownson wrote: >>>> >>>>> A broadband dual pol dish will work from 5.2 to 5.9Ghz. You'll get >>>>> the same gain on both polarities. But there's noting I know of less >>>>> than $150. Usually dual pol dishes are used where you may need a >>>>> higher quality antenna, so all the manufacturers I know of >>>>> (RadioWaves, Maxrad, Pac Wireless) for dual pol are the higher grade >>>>> varieties. >>>>> >>>>> Mike >>>>> >>>>> ________________________________ >>>>> >>>>> From: [EMAIL PROTECTED] on behalf of Blair Davis >>>>> Sent: Thu 9/25/2008 8:41 PM >>>>> To: WISPA General List >>>>> Subject: [WISPA] Dual Pol Antennas >>>>> >>>>> >>>>> All this talk about Dual Pol feedhorns has got me curious.... >>>>> >>>>> I'm looking for a dual pol antenna... >>>>> >>>>> What I need is H-Pol on 5.3GHz band with 18db or more of gain and V- >>>>> Pol on 5.8GHz with 15db or more of gain. A narrow beam width is a >>>>> plus. >>>>> >>>>> A grid or a dish will be fine. I'd like to keep the price down as >>>>> if it is over $150 or so, it really won't be cost effective. I can >>>>> mount 2 antennas at this location if I have to. >>>>> >>>>> This is for a short link, about 2000ft, but it will be at the end of >>>>> about 50ft of LMR-400. >>>>> >>>>> Thanks for any ideas.... >>>>> >>>>> Blair >>>>> >>>>> >>>>> This email and any files transmitted with it are confidential and >>>>> intended solely for the use of the individual or entity to whom they >>>>> are addressed. If you have received this email in error please >>>>> notify the system manager. This message contains confidential >>>>> information and is intended only for the individual named. If you >>>>> are not the named addressee you should not disseminate, distribute >>>>> or copy this e-mail. >>>>> >>>>> <winmail.dat> >>>>> >>>>> -------------------------------------------------------------------------------- >>>>> WISPA Wants You! 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