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UHF Indoor TV Antenna: Utilizing a Delta Loop design.
[Category : - Telecommunications- Audio - Video]
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Interestingly enough, there was not much information about a Delta Loop design, except what I have read in a ARRL Handbook with a single paragraph saying that, "Amateurs have received somewhat better DX characteristics with the Delta Loop design than with the Cubical Quad."
What was more interesting was that few people have utilized the Delta Loop design for anything but the HF bands. I have found that it does quite well when designed for VHF / UHF applications. The following will be for reception of UHF television, but does work fairly well with VHF high band as well.
Characteristics of this antenna include bi-directional reception, good side rejection, is horizontally polarized, and has a gain of about +2dBd (Gain over a dipole antenna) right at frequency resonance, but is quite wide-banded.
Construction of this antenna is very simple with leftover parts that most of you have at home, or are quite easily obtained, as are the tools needed, or suggested, for construction. The main element I have used is #10 AWG solid copper, but brass, steel, or aluminum could work as well with no ill effects. The antenna base is not critical either, except that it has to be non-metallic. The photos below use a wooden block example, but ideally a plastic injection molding, or something else cheaper, would be good for mass production.
Uses for this TV antenna include:
- A quick plug & play TV antenna for an apartment complex, college dorm, summer camp, mobile home, or anywhere an outdoor TV antenna isn't practical.
- Receive 430MHz ATV (Amateur Television) in your area if that activity is known, or 432MHz SSB / CW QSO's and local Grid Square beacons.
- Use as temporary antenna for when you have cable TV or satellite TV service outages.
- Receive LPTV (Low Powered TV) stations, or local TV translators, that your local cable service does not offer.
- An extra TV antenna for a son, or daughter's, bedroom, thus no extra expense for paying extra for cable TV service in those rooms.
- Ready to use if "Internet Over Embedded TV Frequencies Downloading" becomes a reality. (It's being considered.)
- Larger VHF versions of this antenna can be designed since it is of known full wavelength calculations, or even small designs for microwave adaptations.
Some neat features of this antenna include:
- Bi-directional properties to help fight front end overload, receiver desense, intermod, and what was called "analog TV ghosting", a.k.a. multi-path interference.
- Straight 75 OHM "F" connector hook-up, no lossy matching signal transformers, i.e. utilizing a minimum of passive components. Thus, increasing efficiency up to a +6 dB increase of signal by doing so.
- Very compact design is unobstructive.
I can only hope that you can you can get much education, utilization, and enjoyment, for years to come of this indoor TV antenna that you can build yourself, or have mass produced. And I thank you for your considerations in this unique project. More information can be copied via the .JPEG pamphlet below. However, just don't take my word for it, check out some testimonials:
"I was quite impressed with the "Delta Loop" TV antenna. I tested a prototype in several real world TV reception situations and found it to be very efficient especially for its compact size. I've ordered one for my rural lake cottage!"
David Grant
(FCC licensed commercial broadcast engineer)
"As cable and satellite fees continue to mount, consumers are continually seeking new ways to stretch their entertainment dollar. Over the air TV and the many new channels available since the digital switchover is becoming increasingly popular. The Delta Loop is the reliable and inexpensive connection to OTA TV.
Small and simply designed, the Delta Loop has allowed me to consistently view low power stations analog signals, including WBGT, the station I was working to introduce and promote to viewers. Today it outperforms elaborately designed, far costlier antennas for receiving digital channels. I know; I've purchased and returned several of them thinking paying more means getting more.
I've had my Delta Loop for nearly 15 years, and it's used nearly every day connected to a converter box for my bedroom TV. The Delta Loop makes the sometimes tricky game of receiving digital TV easy. "
Salvatore Panzarella
Former Promotions Director, WBGT-CA
Former Technical Supervisor, WHEC-TV
Todd's Delta Loop TV ANT testimonial:
"I live about 30 'the way a bird flys' miles from Buffalo, NY. I went to the store and bought an amplified indoor tv antenna for $30 that literally resembled the V rabbit ears shape. With this antenna in the right spot I was able to pull in 5 of the Buffalo stations and their sub channels (ex 2.2), so maybe 8 digital channels. Then I was in contact with Mr Shoenthal and he mailed me a Delta Loop antenna. Because of the smaller size of the antenna itself, I was able to stick in right in front of the living room window and could pick up 7 stations with all their substations so i could get about 11 digital channels.
Then after a year ago, we moved on to top of a small to medium size hill outside of town and with the Delta Loop I was able to pull in the 11 digital channels before, but also some Canadian channels. I added about 3 more digital channels bringing the total to 14. Then during Feburary 2014 I was able to watch the Olympics on the Canadian channel as well as the Buffalo NBC. The amplified antenna could not pick up these Canadian channels. I think Toronto is maybe 50 miles from us through the air.
Therefore the Delta Loop works better than a $30 amplified antenna from the store and it can be built for much less."
"I was quite impressed with the "Delta Loop" TV antenna. I tested a prototype in several real world TV reception situations and found it to be very efficient especially for its compact size. I've ordered one for my rural lake cottage!"
David Grant (FCC licensed commercial broadcast engineer)
"We were a bit wary about trying the N2MDV UHF antenna, but we gave it a try several years ago when WYDC converted to digital. But, low and behold, it worked great on the very first shot. Can't beat the price and it gets the job done."
Bill Christian
CEO
Vision Communications, LLC
(Incidentally, N2MDV is my amateur radio call sign. "Phil")
Now, as far as what I would like to do with this antenna patent, I would like to either license it, or just down right sell it out, and am willing to negotiate either. The first company that says "YES" to licensing, I am willing to negotiate a sweat percentage deal for you. Thank you.
Financial information
Can be built by do-it-yourselfers with total items costing less than $10.00USD.
Patent publications:
US 6342862
Asking price:
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