内容提示: IEC 62106-6 Edition 2.0 2023-05 INTERNATIONAL STANDARD Radio data system (RDS) – VHF/FM sound broadcasting in the frequency range from 64,0 MHz to 108,0 MHz – Part 6: Compilation of technical specifications for Open Data Applications in the public domain IEC 62106-6:2023-05(...
the invention relates to an antenna, which is between the vhf and uhf frequency ranges of switchable. the antenna includes a capacity element which at a certain distance from the mass of the vehicle the reflective surface is arranged.in the vhf range is achieved by a vote parallelgeschaltete...
This can be used to extend the frequency range of VHF/UHF receivers to high UHF and SHF regions, both for WiNRADiO and third party products. The local oscillator is stable enough for the downconverter to be usable even for narrow-band modulation modes, and has a low noise figure to be ...
The paper describes short range VHF-UHF radio propagation measurements performed in a forested environment using low TX/RX antenna elevations. An empirical... IZ Kovács,PCF Eggers,K Olesen - IEEE 被引量: 47发表: 1999年 Switchable antenna for the VHF and UHF frequency bands This invention conce...
The Very High Frequency (VHF) range extends from 30MHz to 300 MHz, which means that when a VHF sine-wave signal is observed on an oscilloscope, the trace completes from 30 to 300 million cycles each second. The wavelength and frequency of VHF signals has a profound impact on the hardware...
Automatic VHF/UHF frequency range modulation identification methodThe invention discloses an automatic VHF/UHF frequency range modulation identification method. The method comprises steps that, 1, data is introduced in order; 2, time domain abrupt detection the on introduced data is carried out; 3, ...
aBecause the frequency range is 145 to 148 KHz, we consider only amateur radio repeater. We assume that the propagation spacing between repeater and repeater and the propagation spacing between repeater and user are the same. In the situation of VHF spreading, the coverage can be calculated from...
VOR的意思 VOR 英文缩写VOR 英文全称Very High Frequency (VHF) Omnidirectional Range 中文解释甚高频全向信标 缩写分类交通运输 缩写简介
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15.Fast algorithm for joint estimation of DTO and DFO一种时差/频率差快速联合估计方法 16.The difference, expressed in Hertz, between the two limiting frequencies of a band.一个频带的上下界频率之差,单位用赫兹表示。 17.THE INVERSION OF RAYLEIGH WAVE DISPERSION CURVE WHICH LOST FREQUENCY RANGE对缺...