from 1meg to 1.5meg on max worth it?

[Skilldibop]

But the best aerial length is half the wavelength, surely? Hence the huge Radio 4 LW transmitter in Droitwich for 198kHz and small mobile phone aerials for Ghz ranges.

Those are transmitters not aerials. Mobile phone transmitters are small because they don't need huge coverage and can penetrate obstacles more easily than lower energy waves.
For all EM Radiation the larger the surface area of reciever the more radiation absorbed and the bigger the voltage induced :. stronger signal reception.

half the wavelength of a Ghz microwave is measured in micro/nanometres, i've never seen a mobile with an aerial that small, have you?


And i did remember the increased upload if you read up the thread a way

 

[csmager]

Those are transmitters not aerials. Mobile phone transmitters are small because they don't need huge coverage and can penetrate obstacles more easily than lower energy waves.
For all EM Radiation the larger the surface area of reciever the more radiation absorbed and the bigger the voltage induced :. stronger signal reception.

half the wavelength of a Ghz microwave is measured in micro/nanometres, i've never seen a mobile with an aerial that small, have you?

An antenna is just an LC circuit - if you increase its size, the resonant frequency is going to reduce. Hence, as I said, the Radio 4 LW transmitter is massive, and why your FM aerial has wider elements than your TV aerial.

 

[Skilldibop]

That applies only to active aerials. your TV FM and any household radio aerial is passive. I.e there is no supplied voltage. The tuned circuit is within the device itself and normally occurs after the antenna input has been boosted a bit too.
The LW tower is irrelevant as Transmitting signals is a very different business to recieveing them. The aerial in a nokia 3210 was about 50 feet long, coiled internally. I know cos i took mine appart when it broke.

To break it into lamens terms and end this here and now:

Radio waves are EM radiation. EM radioation is made of photons, the same as light only a higher energy. The bigger the piece of metal you have the more of these you absorb. The more you absorb the bigger the voltage and current in the metal get. Thus the strronger and clearer the signal you recieve becomes.
That's how every passive EM aerial in the world works.
It works so well in some cases that you can generate enough voltage to run the radio itself, a la Crystal radios.

Go off and study Wave physics for 2 years and all will become clear to you.