It is indeed possible for a device to generate radio frequency with a wavelength greater than the devices physical size. A typical AM station generates a signal at a wavelength 600 meters to about 200 meters. Most AM stations do not have antennas this long and their transmitter boxes certainly aren't this size.
Frequencies can theorectically be generated with any size circuitry. Im pretty sure this circuit does so using the so called Phase Locked Loop (PLL) circuit, possibly mixing 2 or more together to get the very very very very high frequency by addition. This circuit does not require wire coils (often of relatively large size) to resonate at these "really" high frequencies. There would need to be a filtering step (or two or three) and I can see how this circuit would be hard to miniturize, but I guess they have done it!
Typically for a radio signal to be radiated you need at least a half wavelength antenna but even this can be cheated at. In the microwave region where this device is working at, signals are best radiated using a "dish" type antenna. This chip no doubt does not come with this dish. It simply generates the rf at 24 GHz.
15 celsius might seem warm especially this time of the year in the Northern Hemisphere, but your body is not actually at 15 C. It's at about 37 C. Biology moves slowly at about 15 C, but some organisms can still grow optimally at 15 or less. Human cells are not one of them
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I'm I the only one to notice the grammatical blunder in the topic for this news item?
It is indeed possible for a device to generate radio frequency with a wavelength greater than the devices physical size. A typical AM station generates a signal at a wavelength 600 meters to about 200 meters. Most AM stations do not have antennas this long and their transmitter boxes certainly aren't this size.
Frequencies can theorectically be generated with any size circuitry. Im pretty sure this circuit does so using the so called Phase Locked Loop (PLL) circuit, possibly mixing 2 or more together to get the very very very very high frequency by addition. This circuit does not require wire coils (often of relatively large size) to resonate at these "really" high frequencies. There would need to be a filtering step (or two or three) and I can see how this circuit would be hard to miniturize, but I guess they have done it!
Typically for a radio signal to be radiated you need at least a half wavelength antenna but even this can be cheated at. In the microwave region where this device is working at, signals are best radiated using a "dish" type antenna. This chip no doubt does not come with this dish. It simply generates the rf at 24 GHz.
ZBeat
15 celsius might seem warm especially this time of the year in the Northern Hemisphere, but your body is not actually at 15 C. It's at about 37 C. Biology moves slowly at about 15 C, but some organisms can still grow optimally at 15 or less. Human cells are not one of them