Been checking into the various, wok, steamer, etc DIY antennas (for ex.
-- Circular Definition: see Definition, Circular.
sillyputty hath wroth:
Sorta, kinda, maybe. There was a time when the major source of receiver RFI (RF interference) was from the digital section of the card itself. No need for an outside source of RFI when you can generate it yourself. In the close confines of the typical laptop, radiation from high power noise sources (RAM, CPU, power supplies), directly to the card (not through the antenna) are a real problem.
However, internal noise sources have to be taken into perspective as compared to external sources of interference, such as the neighbors wi-fi system, microwave ovens, cordless phones, and such.
First, spread spectrum is VERY resistant to coherent sources of RFI such as clock oscillators. There really are few broadband noise sources inside computers (even with the "spread spectrum" option to spray the CPU power over a wider area making it easier to pass FCC Part 15). However, the outside sources, listed in the above URL are literally thousands of time stronger than internal sources, despite the differences in proximity. They're also broadband and sometimes high power sources, which are difficult to deal with.
Therefore, I suggest you concentrate on the antenna design, in order to keep the external interference sources out of your system and not worry too much about internal sources. Of course there are some laptops that have internal noise sources. Those can usually be controlled adequately by on board (MiniPCI and PCMCIA) shielding.
Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.