… In order to formulate an upper bound on spectral efficiency that can be gained through
antenna design, we must make the antenna structure part of the optimization variable. In this …

… of such flying BSs, directional antennas can be utilized to … radiation pattern for the directional
antennas. Based on such a … antennas and the UAVs have identical directional antennas …

… We assume effective echo signals are coming from the direction corresponding to the maximum
antenna gain, and hence the results serve as upper bounds for other target directions. 1) …

… Q-factor bounds can be used to determine the optimal bandwidth positions for antennas, …
We also construct an essentially bandwidth optimal embedded antenna, which is interesting …

… at optimal and coaxial orientations of antenna beams for various propagation scenarios, …
of the directional antenna use and their direction choices on the channel capacity versus …

… to steer directional antennas. This kind of protocols are proposed to guarantee upper bound
on the pairwise worst case neighbor discovery time. However, they fail to achieve bounded …

… -directional antenna is known to be capable of providing a larger coverage than a directional
antenna… density in the network, the directional antenna can also overcome the drawback in …

… antenna size thereby providing a physical bound on the system performance that we compare
to the standard size-unconstrained Shannon capacity. … depends on the antenna size and …

… antenna spacing are compared. To analyze the performance of the continuous source and
destination, the authors of [8] derive the capacity bound … the antenna gain of each antenna is …

… For the considered scenario, we derive the Cramér-Rao lower bound (CRLB) for … r We
derive the ultimate bound on the localization perfor- … We set the number of gNB antennas to …