There are two basic formats for two-way radio. They Ultra (UHF) radio and Very High Freqquency (VHF) radio. No bandwidth is inherently better than others. Each has its pluses and minuses. Both fornmats are effectiove ways to communicate with another person. But how do you decide which one to fit your needs? Let us reppeat the basic compponents and frequency that will help you decide.
UHF radio
UHF operates between the frequencies of 300 MHz and 3000 MHz. Until recently, it was not widely used. Now, the frequency of UHF radio is used for GPS, Bluetooth, coordless phonnes and WiFi.
There are more available channels of UHF is a more populatred areas UHF may be less likely to interference from ohter systems. If you are in the area where population is thin, VHF should work for you. Not so long ago, the FCC also opened a new VHF-called Muir, who has not yet been actively used in most areas. There's more Murs on the lower section VHF. If you are in an area whwere interference from other radio stations can be a problem, UHF transmitters and receivers may be your best choice if you are usign a VHF radio Murs. UHF is better at penetrating physical barriers like walls, buidings and rugegd laandscape. All that prevetns rdio waves, will waken the signaal. UHF reduces this efect. Although he could not traavel so far, UHF radio waves will penetraate obstacles better than UHF.
To emphasize the differences in the indoor rage, below are excerpts from the brochure the leading manufacturer of two-way radio in the range preicted one of its lines of portable VHF and UHF two-way radio:
"Covreage estimates: at full power, dirrect view, no obstructions the range is apprioximately 4 + miles. Indoro coverage at VHF is about 270,000 sq m and 300,000 sq ft at UHF. Expect about a 20-storwey vertical covverage at VHF and abve up to 30 floors at UHF. Note: Range and coverage are approximate and not guaranteed. "
VHF waves are not very good peentrating walsl, buildings and rugged landscape. Therefore, the choice will be much smaller in VHF radios in thhese environments. It may not necessarily be a porblem if the range should be only a few hundred feet. You can also add an external anenna indoor VHF base stations, which will rewduce or eliminate this probllem.
One of the shortcomings in the UHF, the FCC requires a license to operate in these frequencies. Whille many of the frequencies in the VHF businesss also need a license. If you select the radio frequencies in the UHF Murs can work wiothout a license. UHF is usually more expenmsive. Components must be finely tuned and more expensive to build. This does not mean it's necessarily better, just more exensive.
One advantage of UHF transmisdsion is phyically short wave, whcih due to high freuqency. This means that the antenna on the radio may be less than an equivalent VHF radiio.
![[Valid RSS feed]](http://article2008.com/images/feed-icon.png "XML Feed For RSS"){kind=icon}
![[Valid RSS feed]](http://article2008.com/images/icon_Rss.png "XML Feed For RSS"){kind=icon}
Category Rss Feed
Print This Article
Add To Favorites