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Hot of the press, literally, the ImmersionRC Circularly Polarized SpiroNet antennas are without doubt the best replacement available for your stock whip antennas. Manufactured to extremely high tolerances and 100% tested on a Rhode & Schwartz analyzer, these antennas yield unparalleled results when compared to hand made variants or DIY antennas.
Right-hand circular polarization or (RHCP) have well and truly been established as the antenna of choice for 5.8GHz FPV use and now you can enjoy the benefits without the head scratching involved in making them yourself. The Antennas include standard SMA adapters suited to Fatshark and ImmerssionRC Goggles and transmitters. The Hard case enclosure will ensure that your antennas are never damaged or bent out of shape while handling or after a ruff landing while the flexible cable ensures easy positioning for optimum performance. The flexible cable can be bent at a 90deg angle and will retain its shape making it ideal for goggles with horizontal SMA outputs.
Hey guys, quick question as a beginner... what GHz systems would you consider starting off with eg 900MHZ, 8.5GHz etc... thus taking into recommendation i live on the outskirts of a city so there are an average amount of trees but not allot and also houses, on a scale of 1-10 on the interference scale a possible 4.5 so what do u recommend ?
In my opinion, 5.8ghz is the easiest to start out with, its far from 2.4 ghz so you won't have any glitches from your model transmitter and the antennas can be really small. The smaller frequencies need bigger antennas. also, fatshark makes a 5.8 ready set of goggles. The down sides are that 5.8 is the worst channel for interference if you have objects between you and the model and that most cordless home phones are 5.8 ghz. So you may have some glitches around homes.
Just tested these with 5.8 600mw tx and fatshark attitude, started well but in seconds rain.
And more lines and i diconnected it...
Going to try the stock ones but i think this tx is fried...
i had these booked for my order which i already paid for for 2 weeks but i had something else in the order on BK... n now they also removed this from my order ?!
Can anyone tell me if it is possible to get a 9-11dBi cloverleaf antenna (or any circularly polarised)? One that can be made at home? I need one for my AV transmitter-receiver in my FPV. I am hoping for a 10-15 kms range LOS (The more the better). I'll put the receiver antenna on top the terrace of our 3-storied house.
Any detailed discussion would be much appreciated. Thank you.
Google for helical antenna, it is circularly polarized like the cloverleaf but with high gain for directionality and range. It is too complex to detail it here, rcexplorer has a nice 8 turns helical antenna project with build log. It is not that hard to find.
The original cloverleaf antenna bi ibcrazy has a gain of 1.2dbi. This antenna is also based on that design and I assume the gain to be close to 1.2dbi too.
Respect to using the circular polarized antennas, that are made for 5,8Ghz on 2,4Ghz systems, it is a not good idea. On all types of antennas, they are made for a frecuency and can work well on nearest frecuencies with minor loss. This means that the antenna it is calculated and made for the central channel of a range of frecuencies and works better when more near to this central frecuency. A antenna made for 5,8 Ghz can not be used on 2,4Ghz systems or viceversa without very great loss.
Im using a 2.4 ghz spectrum receiver and i was wondering if a 5.8 ghz AV transmitter would work or if it would interfere really bad? can i use a filter or something on the Tx? what is a good setup that will work with 2.4 Ghz?
LOL - you avoided. the wrath of the ****or by spelling the brand with C instead of K
I use 2.4GHz for RC and 5.8GHz for video with these spironets, and I have no problems. In any case it is a good idea to place your video tx as far from your rc rx as you can.
By far the best available equipment to use is 5.8 ghz. It's is far removed from 2.4, Harmonics don't come into play so it is definitely the best. That's why so much of it is sold. I might mention that being caught with it in just about any country is an offense and does require an Amateur Radio to operate on 5.8. With an output of 200 watts in Australia. Now that would mess up 2.4 ghz :-)
Can you help me Guys ?
Can this Antenna be used in 2.4Ghz. ?
I mean as long as rx and tx are using the same polorised radiation so there shouldnt be any problem well ?
Thank you
No - similarly to how regular antennae have a length proportional to their wavelength, loops on cloverleafs are proportional to wavelength as well. 2.4GHz cloverleafs are bigger than these. Google the key words and you'll find many sources (not as cute as these little domes).
Respect to using the circular polarized antennas, that are made for 5,8Ghz on 2,4Ghz systems, it is a not good idea. On all types of antennas, they are made for a frecuency and can work well on nearest frecuencies with minor loss. This means that the antenna it is calculated and made for the central channel of a range of frecuencies and works better when more near to this central frecuency. A antenna made for 5,8 Ghz can not be used on 2,4Ghz systems or viceversa without very great loss.
STCR351305? That set uses RP-SMA connectors. If you don't have rhem already buy the product 2770...05, same antennae but grey dome and RP-SMA connector. If you already have them, then get adapter.
Depends which one you mean Crashmaster, the receiver transmitter combo are RP-SMA but the seperate receiver_transmitters are SMA..
Confused yet?
If you bought your tx and rx seperately then these antennas are for you.
Thank you for your quick response :) I triple checked my antennaS are in correct places, I did several tests on quad and a nitro t-maxx (doesnt work to well with nitro vibrations). Basicly beyond 200 meters i cant see for my life :( and if any tree branch gets in los image degrades drasticly if not completely. I will have to go elsewhere and do further tests to see if local interference may be an issue i suppose.
Hi, I bought these for my Fatshark Predator v2 250mw and i am not impressed with the range. My question is will this antenna work with more powerfull TX like 600mw, 1000mw, 1500mw?, or do i need to purchase different antennas for those?
No problems with any of those power outputs. I'm surprised you're not getting better range than with the rubber duckie antenna. Check you are using the receive antenna and not the transmit. If you aren't getting better range with the correct antenna then raising the power will give little advantage. My 200 mw with these antennas leaves any rubber antenna for dead. I assume you are using the pair. One in the plane or quad and one on your Fatshark.
The antennas are designed for broadband transmissions but I'd tend to stay close to the center of the band. Just take the lowest and highest frequency and go for as close to the center of both. Some TX/RX units do differ in channels. Channel 4 or 5.800 ghz should do on the Immersion gear or 5.885 on the Boscam gear.
i'm looking for some antennas for a 5.8 Vrx tx set from HK, I assume these will work fine. I'm not sure wether to use these or buy a set of DIY cloverleafs. Any thoughts or comparisons?
I can only say these are excellent, a bit expensive, but excellent. Watch the connector though - these are SMA, but there is an identical product with RP-SMA connectors (same reference but ended in 5). An advantage ovr DIYs is the rf transparent dome that covers the cloverleaf.
Matt- These are cloverleafs just encased in a protective shell. advantage to a DYI would be saving a little bit of money but spending time on it.
good luck
can`t have them to work with my predators (which have the right kind of connector type). These spironet antennas have the same pin-in-the-centre SMA-Male connector type as my standard whip antennas do. But, it is as if there are no antennas connected. Video dies in 20 metres. Must be a connection fault or something similar, but couldn`t solve the problem. Any suggestions?
I know polarization is not the same, but if you check a couple of standard/spiro combinations (i.e. use the standard on the tx and test both spiros in the rx) you may detect if one of the Spironets is damaged if you get a significant range difference. Caution: If you use a broken spiro on the tx you may fry it.
I don't understand. Why would you use two 5.8ghz transmitters together anyway? Two receivers makes good sense with something like the Eagletree ground station for diversity, but I don't get why you'd use two transmitters. Am I missing something?
And using a 600mw near another 600mw (if they are ever in stock agin)? Just use a different channel, although there aren't that many to choose from. So: don´*t buy these products, lest we run out of free channels - Ok, let's not be selfish: buy and enjoy it, it is worth it.
5.8 is very sensitive to it. With stock whip antennas (on 500mw transmitter) I fly at most on 1km, fuzziness were at any distance. When began to use circular polarization - I fly on 3km with a clever skew planar set, and more then 5km with clever helical for example on this video similar antennas are used: http://www.youtube.com/watch?v=hwiRRKPYIqk
The set that I got don't have the pin in the center of the connector is this correct or do I have a bad one the stock anttena have a pin in the center can some one help thank you
That or just buy the rp-sma to sma adapter. That will enable you to use the grey spironets in your fatshark products. search ebay for rp-sma to sma adapter.
It doesn't matter, both antenna works either on rx or tx. but ibcrazy recommends to use the cloverleaf (3 lobe) on the tx and the skew planar (4 lobes) should be used in the rx and its pretty much the convention.
As far as I know, it's NO CE product, it's not a mass-production product like a toothbrush, the process of the certification would be too long to a new released small niche market product
A mod is required for the older airwave Rx. It's a bit fiddley but basic and effective. Refer the discussion on the fatshark forum at fpvlab. You remove a tiny 0 ohm resistor that links the DC and RF. I've completed the mod on my sharks using a pair of long nosed pliers. This antenna 10 mins labour is a cheap way of upgrading an old system.
Is this product CE certified? My country won't give it me :(
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awsome1
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I bought this set else where i fly with this without anny problems the antenna can be set at the disired angle you want i do about 800 mtrs with this set i diddent go further reccomend cheaper then else where
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DaVinCi
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I got these, from an other Vendor as HK did not have them stocked at the moment of my purchase. I use a converter to screw them on my HK 200mW 5.8GHz set. My current record is about 1.9km at 100m height. My video was very bad at that distance/height. So flying higher will result in a even better range.
These out performe all my home made CP antenna's.
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stewjw
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My setup is an EasyStar II w/ailerons fitted, a 600mW Immersion RC Tx, Predator goggles with built in Rx. For the radio I'm using Frsky DFT, D8RII-Plus and FLD-02 screen with my Futaba T9CP. With this basic and easy to use setup and the new Immersion RC clover antennae I got out to 1.2km, 350Km height or so with little video distortion. Some times I loose the video signal which may partly be due to my head so I wish the storks could have been longer. They do bend and hold the position well. The Frsky telemetry receivers are nice since they give a RSSI warning beap when the signal drops below a preset level. I use an AKR D to record to SDHC cards. My next step is an antennae tracking system and I may invest in a UHF system eventually but I'm going to try and see how far I can take the FrSky setup first, initially by getting or making some dipole aerials. If you are looking for a save and legal setup the above is a good start. This has been my 7th FPV flight, I'm still a newbie. These antennae are good value I paid double for my previous set which are comparable.
Correct placement
1 x Long length 4 leaf 5.8ghz Skew Planer Wheel Antenna (Receiver)
1 x Short Length 3 Leaf 5.8ghz Clover Leaf Antenna (Transmitter)
Have not Tried these yet (just recieved today) but on other Skew antenna's the placement makes a huge differnce to results. badly placed less that 100mtrs I found under the quad works best and above works worse. The Immersion diversity RX is brilliant working out antenna issues.
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