Limited by the effective launch capacity of a rocket, deployable antenna is very important in design spaceborne array. Compared to traditional antenna, flexible coilable array has higher surface precision and better vibration control therefore more suitable for high frequency communication. In order minimize weight satellite reduce cost its launch, guideline geometry parameters crucial. Existin...

A beam-changeable concentric annular Leaky-Wave Antenna (LWA) array is proposed, which contains two LWAs with constant-interval slots. By changing the excitations of LWAs, radiation beam can be changed to different shapes and in directions i.e. single normal direction, conical 40° a synthetic beam. theoretical model for analyzing properties LWA put forward, prototype radius 42.6 mm heigh...

In order to properly cover different scenarios, radiation patterns of antennas should be accordingly designed. However, most are unable provide either broadside beams or designable conical beams, which the typically used for radio coverage, based on one single-structure format through adjusting parameters before fabrication. this paper, a planar circular polarized (CP) annular leaky-wave antenn...

With a proper design, the aperture field of a conventional radial waveguide pin-fed non-resonant array antenna (RWPFAA) can be rendered equiphase at a given central frequency. However, when the operating frequency deviates from this central frequency, the aperture field will exhibit an undesired conical phase error. To alleviate this problem, we propose a novel design in which the frequency-dep...

This paper presents the design of a tri-mode matched feed horn to remove the beam squinting effects in a circularly polarized offset parabolic reflector antenna. In a conical horn, three modes i.e., TE11, TM11 and TE21 are combined in proper amplitude and phase proportion to obtain a tri-mode matched feed configuration. The proposed tri-mode horn is then used as a primary feed device to illumin...