Antennas come in a wide range of forms depending on the application, service, and frequency of operation. Some antennas you can’t even see — like the four or five units in your smartphone. These antennas are single element devices, a metal structure, or printed circuit board (PCB) pattern...
n1 element antennas are arranged at a constant interval on the first concentric circle, radius rm of the m-th concentric circle is calculated using D2 not smaller than the maximum outer element dimension D, and maximum integer of element antennas satisfying a specified formula are arranged on th...
If all antennas used are Earth-bound, the spatial resolution attained is of the order one milli-arc second; when satellite-borne antennas are used in conjunction with a VLBI network of antennas, the attained resolution is even finer—see section 1.3.3. ...
The average value of these element efficiencies is a significant summary parameter, and plays a prominent role in circumscribing array performance. A useful formula gives the minimum number of antennas necessary to realize a prescribed peak gain envelope. The important special case of an array of ...
Option to enable parallel pool, specified as a logical value. The default value isfalse. Set the flag totrueor1to enable the parallel pool. Use parallel pool to speedup the return loss calculations at multiple frequencies for computationally large antennas and arrays. ...
Phased array antennas can be electronically steered and do not have moving parts, making them an efficient and cost-effective solution for today's complex radar and communications systems. This newly revised edition of the Artech House classic, Phased Array Antenna Handbook, offers the most up-to...
It can be also divided into linear phased array antenna, 2D phased array antenna etc, in terms of the distribution of antenna elements. Although different phased array antennas have their own characteristics, the basic principles are the same17. In this paper we mainly discuss about the single ...
Disclosed is a method and apparatus for calibrating phased array receiving antennas that includes circuitry for generating a pair of calibration signals separable one from the other. The signals are i
Pattern reconfigurable phased‐array antennas can implement the function of beam control and overcome the limited scanning angle of traditional phased‐arr... H Xing,K Zhang,M Wang,... - International journal of RF and microwave computer-aided engineering 被引量: 0发表: 2022年 A Study Of a ...
The present disclosure relates to directional or steerable beam antennas, of the type employed in such applications as radar and communications. More specifically, it relates to a dielectric waveguide antenna, in which an evanescent coupling geometry is controllably altered by switchable elements in an...