Beam-Splitting Condition in a Broadside Symmetric Leaky-Wave Antenna of Finite Length

Gain enhancement of a printed finite-length leaky-wave antenna using lumped elements at edges

“…Properties of a finite size leaky wave antenna were discussed in [3]. A finite size leaky wave antenna can still remain broadside radiation even if β > α.…”

“…A finite size leaky wave antenna can still remain broadside radiation even if β > α. However, the antenna is modeled with a load at the edges of the leaky wave antenna in [3]. Hence, effects of remaining power and edge reflection were not taken into account.…”

A Simple Leaky-Wave Analysis of 1-D Grooved Metal Structure for Enhanced Microwave Radiation

“…For example, the number of required periodic grooves is closely related to the leakage constant [17]. Also, condition (phase and attenuation constants) for which broadside radiation may occur from a symmetric 1-D periodic leaky-wave structure is known [18], [19].…”

Radiation characteristics of finite-length 1D-uniform leaky wave antennas radiating at broadside

“…Recently, a study of leaky-wave radiation at broadside from uniform structures with infinite apertures was presented [2], establishing fundamental properties related to the maximization of power density radiated at broadside and some basic features of the radiated beam. The beam-splitting condition for finite-length symmetric fed broadside leaky wave antennas was also investigated [3]. In this paper, various radiation characteristics such as the radiation pattern, side-lobe level, normalized gain, and pattern bandwidth of a symmetric-fed finite-length leaky-wave antennas are discussed.…”

“…noted that the radiation pattern exhibits a main beam at broadside if the ratio R = β / α is not too large[3]. The radiation efficiency of the antenna is related to the attenuation (leakage) constant α as…”