网站:http://ebjornson.com/research English: An antenna array can control the directivity and shape of the transmitted signal. The signal strength at the receiver is maximized using maximum ratio beamforming, to support higher data speeds. The strength can also be minimized using zero-forcing ...
Linear antenna arrays are synthesized to have maximum directivity for a specified beamwidth. The directivity is maximized subject to a given beamwidth such as null to null or half power one. The excitation currents are obtained using a matrix equation obtained from the Lagrange m...
This paper presents an antenna loaded with metamaterial to enhance its gain and directivity to improve the performance of a ground-penetrating radar system (GPR). We adjusted the parameters of the antenna to change its equivalent capacit... L Liu,C Zhang,L Yu,... - 《Journal of Microwaves ...
A fully analytical form, more general than any reported previously, for the optimum current distribution and maximum directivity of an arbitrary array consisting of dipoles parallel with each other, is derived. For an array configuration consisting of several hundred elements, a calculation takes a fr...
In order to take the path loss into consideration, we have measured the average received power rrefray when a signal is sent with transmit power of P as 1 and with inter-node distance of dref , and use this value as a reference. Note that the impact of antenna directivity gains is ...
Maximum Flow Rate in Open-Channel Flow for a Circular Pipe Introduction This application determines the greatest attainable water flow rate in a partially filled circular pipe. It uses the Manning formula to determine the flow rate in the open-channel...
Linear and planar antenna arrays are synthesized to have maximum directivity for a specified sidelobe level. The directivity is maximized subject to a given SLL. The beamwidth and the zeros of array factor are studied as well as the directivity. Maximum directivity-arrays are com...
For a half-wave thin asymmetrically fed V antenna,the angle subtended by the arms have been optimized against the ratio of arm lengths in order to ensure maximum directivity. Subsequently,an empirical relation is also proposed to relate this optimum value of antenna internal angle to the antenna...
E. Shamonina and L. Solymar, "Maximum directivity of arbitrary dipole arrays," IET Microw. Antenna P., vol. 9, no. 2, pp. 101-107, 2015.E. Shamonina and L. Solymar, "Maximum directivity of arbitrary dipole arrays," IET Microw. Antenna P., vol. 9, pp. 101-107, 2015....
The derived limit extends the well-known upper limit on the ratio of antenna directivity to its quality factor to the lossy antennas. Optimal antenna current distribution for the maximum gain is found, and the radiation pattern and antenna efficiency are also presented....