Broadband wireless access

Introduction to WLL: Digital Service Technologies

“…The systems, known as Local multipoint distribution systems (LMDS) [30], can provide many more channels with a higher quality but lower range. It is considered as a strong candidate for next-generation broadband WLL (B-WLL) services.…”

General aspects of digital technologies for wireless local loops

“…The primary disadvantages of both the MMDS and LMDS are co-channel interference from other cells and limitations on coverage (up to 25 miles for MMDS and up to 5 miles for LMDS) [10]. Millimetre-wave radio signals do not penetrate trees.…”

Q‐band to V‐band 1D and 2D elliptical lens antenna arrays

“…Attempts have also been made to apply the substrate lens technique for wireless communications at 30 GHz [4]. The present work is concentrated on adapting substrate lens antennas for plasma radar reflectometric imaging applications operating from 38 to 75 GHz, although the results have broader applicability, such as broad-band wireless communication systems [5], automobile automatic cruise control [6], Intelligent Vehicle Highway Systems [7], and aircraft landing systems [8]. In the intended application, features such as high directivity, efficient coupling to Gaussian-beams, low cost, and the capability of multiple-beam formation with extended coverage are of critical importance.…”