Electrically-small Luneburg lens for antenna gain enhancement using new 3D printing filling technique

Cost-effective wideband dielectric planar lens antenna for millimeter wave applications

“…This brings the opportunity to implement cost-effective solutions. Amongst the solutions found in literature, we can find 3D-printed lenses that use graded index lenses 14 , 15 , Fresnel Zone plates 16 , Luneburg lenses 17 , 18 and Gutman lenses 19 amongst other implementations 20 – 23 . However, there is still a need to find solutions that are easy-to-print and that fit under a planar lens category.…”

A 3‐D ‐printed Luneburg lens antenna with consistent multibeams based on quasi‐pyramid structure

“…And the simulation of Feeds 5-8 can be introduced by the central symmetry. Slightly different from classic dielectric antennas, [34][35][36] the E-field performance analysis of Luneburg lens antenna is mainly focused on space variations of the wavefront before and after the lens, [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] instead of propagation mode. As can be observed from Figure 7, the relative phase of the propagating fields is rebuilt and then the necessary wave-transformation functions to enhance gain and turn the original spherical wavefront to be planar.…”

“…Periodic unit cells are structures with the same geometrical characteristics and different dimensional parameters that can achieve the gradient permittivity. Frequently practical periodic unit cells in spherical LLA include the ring-type units, 20 the single or cross cubical lattices, [21][22][23] the dielectric hole-type units, [24][25][26] and the quasi-icosahedron model, 27 etc. Structures vary with continuous functions are also introduced to design special units, which achieve the ideally continuous permittivity distribution of LLA, such as the circular truncated cone, 28 the dielectric curve-type units, 29 and the dielectric rod-type units.…”

A novel mushroom antenna with high gain using three dimensional printing

“…In Reference [23], a parasitic lens antenna with high gain is proposed, the high-gain characteristics is due to manipulates the reflecting and transmitting. There are a lot of reports of Luneburg lens antenna with 3D printing, [24][25][26] the desired dielectric constant are obtained by changing the density of 3D printing. A 3D dual band gain slotted spherical antenna is introduced in Reference [27], the antenna operating at X and Ku bands.…”