The goubau multi element monopole antenna - revisited

Ultra‐wideband directional electrically small antenna for UHF through C‐band 5G and beyond 5G applications

“…In recent works, directional electrically small antennas (ESAs) with appreciable bandwidth are realized using mode combination 2,3 or parasitic elements. 4 For wider bandwidth, multiple colocated elements 5,6 or resistive loading 7 have been used, and for some applications gains as low as −35 dBi 7 or −15 dBi are found to be acceptable. 8,9 In this letter, a vertically polarized ultra-wideband antenna further miniaturized by a factor of 3.3 times from the antenna found in Elmansouri and Filipovic 10 is proposed for operation over 0.42-6 GHz for 5G and beyond.…”

“…In recent works, directional electrically small antennas (ESAs) with appreciable bandwidth are realized using mode combination 2,3 or parasitic elements 4 . For wider bandwidth, multiple colocated elements 5,6 or resistive loading 7 have been used, and for some applications gains as low as −35 dBi 7 or −15 dBi are found to be acceptable 8,9 …”

Rapid Prototyping across the Spectrum: RF to Optical 3D Electromagnetic Structures

“…Recently, a 3D conformal shadow mask was used for selective metallization of antenna patch elements and feeds to form a 2x2 array on a doubly curved surface (Figure 16(a)) with fully conformal metallic ground plane that operated at 4GHz [137,138]. Figure 16: (a) Conformal antenna patterned by sputtering [138], (b) Small spherical wire antenna covered with conductive paint [73], (c) Optical image of an antenna during the printing process [135] A further step in a fully conformal design was demonstrated by the Lewis group, where conformality not only helped adapt the antenna to a given shape but also helped to achieve 3D electrically small antennas ( Figure 16 (b-c)) that approached the fundamental limit for size significantly better than rudimentary monopole designs [135,139,140]. The antennas were fabricated by conformal printing conductive inks onto convex and concave hemispherical surfaces in meander lines.…”

Wideband Design of a Compact Monopole-Like Circular Patch Antenna Using Modal Analysis

“…INTRODUCTION NTENNAS with monopole-like radiation patterns are widely used in wireless communication systems, such as indoor wireless networks and vehicle communication networks [1], [2]. To reduce the size of wireless devices, compact and low-profile monopole-like microstrip patch antennas with low cost and easy fabrication were developed in the past two decades to replace the conventional monopole antenna [3]- [12].…”

“…A tri-mode monopole-like patch antenna is designed in [10] by exciting the TM01 and TM02 modes of the patch and the TM02 mode of the parasitic ring. Multi-element antenna analyzed by the diakoptic theory is also used to achieve the dual-resonant monopole antenna (so-called Goubau antenna) in [11]- [12]. However, its profile is relatively high compared with printed patch antennas.…”