نتایج جستجو برای: television antenna
تعداد نتایج: 69152 فیلتر نتایج به سال:
Satellite television is a service that delivers programming to viewers by relaying it from communications satellite orbiting the Earth directly viewer's location. The signals are received via an outdoor parabolic antenna commonly referred as dish and low-noise block down converter. A receiver then decodes desired programme for viewing on set. Receivers can be external set-top boxes, or built-in...
In this paper, we will discuss the DVB-SH standard and address the need for mobile TV reception via satellite. The advantage of a satellite based mobile TV service compared to terrestrial based mobile TV service is emphasized in this paper. The technical challenges of a satellite based mobile television reception technology are addressed. The salient features of the DVB-SH standard have been di...
Peripheral Slits Microstrip Antenna Using Log Periodic Technique for Digital Television Broadcasting
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
In this paper, we investigate and compare two different antenna types for UHF SATCOM applications; proposed Moxon type (bent dipole) and conventional egg beater (loop) antennas in terms of antenna performance and physical size. Bent dipole and egg beater antennas are simulated using HFSS software. Prototype antenna for Moxon type is also fabricated and measured for its return loss using Agilent...
We describe two methods for correcting an omitted variables problem in discrete choice models: a fixed effects approach and a control function approach. The control function approach is easier to implement and applicable in situations for which the fixed effects approach is not. We apply both methods to a cross-section of disaggregate data on customer’s choice among television options including...
This letter presents a new directional dual-band slotted trapezoidal inverted-F antenna (IFA) for indoor Wireless Local Area Network (WLAN) applications. The dual-band performance can be obtained by tuning the lengths of the inner symmetrical trapezoidal slots and the outer trapezoidal arms in a nearly independent manner. The measured results show that the proposed antenna can provide two separ...
establishing and operating private radio and television and its possible activity beside state radio and television is the selective method of administering radio and television in many countries worldwide. in legal system of iran, state run radio and television in article 44 of the constitution and interpretation of guardian council of mentioned article, establishing private radio and televisi...
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