Miniaturized wideband dual linearly and circularly polarized printed square slot antenna for multiradio wireless systems

Epsilon‐shaped circularly polarized strip and slot‐loaded ultra‐wideband antenna for Ku‐band and K‐band

“…A comparison of the proposed dual‐band CP antenna with other reported structures having narrowband/multiband/broadband/wideband CP in terms of various performance parameters and dimensions is tabulated in Table . The antennas reported in References provide broadband circularly polarization and have relatively larger size. Also the antenna structures reported in References provide wideband CP with small IMBW and 3‐dB ARBW.…”

“…10 Further, the researchers have reported various approaches to achieve single-band/wideband/broadband/ dual-band CP antenna using different approaches, that is, dual or synchronous feed, fractal structure, multilayer reflector antennas, ground plane, or radiating patch loaded with different stubs/slits/strips. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] In these structures, multiband/broadband/wideband circular polarization was achieved by using different techniques like two asymmetric T-shaped fed line, 11 an Inverted-L strips, 12 grounded L-strip and a lightening-shaped patch with asymmetric feed, 13 three grounded L-shape strips, 14 dual fed circularly polarized square slot antenna (CPSSA) with L-shape patch, 15 two crossed dipole antenna includes meander line loaded spidron fractal patch, 16 slanting edge defected ground structure (DGS) and dual orthogonal arms, 17 two deformed parallel monopoles, 18 pair of SRR on the backside and corner truncated square slot, 19 G-shaped slot antenna with SRR loaded, 20 an I-shaped grounded stub with two parasitic elements, 21 a monopole patch with two orthogonal feeding ports, 22 a spidron fractal patch with microstrip-fed, 23 a hex decagon circular patch with defective ground structure, 24 strip and slotloaded coplanar waveguide (CPW)-fed square slot antenna with two spiral slots, 25 CPW-fed dual sense CP antenna with grounded spiral slots, 26 a compact 3D CP antenna with wide axial ratio beamwidth. 27 All the previously discussed antenna geometries have either large dimensions and narrow impedance bandwidth (IBW) or narrow axial ratio bandwidth (ARBW).…”

A dual‐band and wideband omnidirectional circularly polarized antenna based on VO2

“…With the improvement of requirements in antenna performance, the omnidirectional circularly polarized (CP) antenna has become a research hotspot due to its excellent performance, such as the inhibition to polarization mismatch loss and the larger signal coverage . As a result, the omnidirectional CP antenna has various applications in wireless communication, television broadcasts, space vehicles, and so on …”

Wide‐bandwidth multifrequency circularly polarized monopole antenna for wireless communication applications

“… have tried to enhance the bandwidth and Refs. emphasize on circular polarization (CP) antennas. Here, we have proposed an antenna in which all these features are integrated into a single design.…”

“…[1][2][3][4][5][6][7][8][9][10] Similarly, for bandwidth enhancement, many approaches have been reported by the researchers such as annular ring encircled by a rhombus strip, 11 desktop shaped microstrip patch, 12 U-shaped slot patch antenna, 13 E-shaped microstrip patch, 14 Y-shaped patch antenna, 15 U-shaped patch, 16 wide slot with parasitic center patch, 17 and curved slot. 18 On the other hand, circularly polarized [19][20][21][22][23][24][25][26][27][28] antenna in wireless communication system is another major application which minimized the effect of multipath reflection. As a result, the orientation between two antennas (transmitter and receiver) becomes more flexible.…”