Dual band antenna for GSM and UMTS
Dual band antenna for GSM and UMTS
(OP)
I need an antenna to be low profile (suitable to be mounted on a Helicopter) and that covers GSM upload band (880-915)and UMTS upload band (1850-1980)
A design with a circular polarization is the optimal that i can expect.
I will appreciate any idea or document,
Thank you
A design with a circular polarization is the optimal that i can expect.
I will appreciate any idea or document,
Thank you





RE: Dual band antenna for GSM and UMTS
Are there any 'cell phone' antennas for aircraft on the market yet? They'll probably be a blade, but I'll bet that 95% of present aircraft antennas are blade.
RE: Dual band antenna for GSM and UMTS
Which circular polarization? RHCP, or does it matter?
You may want to describe the installation a bit more, i.e. cut one hole, size LxWxDepth. Unit protrudes X inches above flush. Connector type ?N-f. Maybe describe how you want to mount it.
kch
RE: Dual band antenna for GSM and UMTS
LxWxH : 10x10x5 cm (maximum dimensions)
For the feed type there will be a coax line that can feed the design.
So the design needed is a low profile antenna (by expample: microstrip , aperture coupled ...)and should be placed on the Helicpter on the lower part.
Any idea for he design or a paper related is a great help for me.
Thank you
RE: Dual band antenna for GSM and UMTS
These are typically advertised for trunk mounting or vehicle mounting. I don't know how suitable they would be for an aircraft. The offering from one of these companies (I won't state which) was actually wideband - basically 800 MHz to 2 GHz when swept (!), but exhibited plastic problems when we tested at cold temperatures - we fed the data back to them and they were going to use a new plastic.
Maybe an offering from one of these companies will work. However, many times a company advertising an antenna doesn't actually make the product but private-label it from an obscure source.
RE: Dual band antenna for GSM and UMTS
Boss: "It MUST be low profile."
...6 months later...
Eng: "All the antennas that are available off-the-shelf are blades. A low profile version will take 22 months and cost $190k for NRE."
Boss: "The blade will be fine."