English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, a broadband dual-polarization slot antenna based on differential-feed at X band is proposed. By adopting wide round slots, the antenna inherits a good advantage of broad band. And the multi-layer structure achieves a good isolation between the two ports. In order to improve the high cross polarization level (XPL) and pattern distortion for wide slot antenna, differential feed is introduced. Simulation results shows that the proposed antenna obtains a 27% and 30% return loss bandwidth below -10 dB at each port respectively. The port isolation is below -20dB within the common band. The largest XPL in the range of half-power angle is -15dB. And the gain is 7.5dBi to 8.5dBi for port1 and 6.5dBi to 9.5dBi for port2. Introduction The planar slot antenna has the characteristics of small volume, low profile, low cost and simple integration. It has good paperback structure and is suitable for low-profile and embedded installation[1]. Due to these good features, planar slot antenna is widely used in broadcasting, satellite communications, airborne or missile-borne radar and meteorological, navigation, beacon, etc. With the rapid development of conformal technology, the planar slot antenna will occupy a more important position. In 1989, J. Hirokawa proposed the idea of using wide slots to extend the band width [2]. The rectangular wide-slot slot antenna in [2] achieves a return loss bandwidth of 35%. When using circular slot or elliptical slot, the wideband effect of the rectangular wide slot antenna can also be realized. In [3,4], a rounded microstrip line feeds a circular slot antenna, and through adjusting their relative position can achieve an impedance bandwidth of 82% and 127% respectively. [5] deforms a circular slot to a P-shaped slot, and feeds by a simple 50 transmission line. The antenna can work stably in the range of a bandwidth of 70%. In terms of dual-polarization slot antennas, [6] uses an annular slot and two mutually perpendicular microstrip lines to achieve dual polarization. By adding a conductor strip line on the opposite side of the feed line, the isolation between the two ports lowers to -33dB and the cross-polarization level reaches below -30dB. But the bandwidth is only 4% at 2.4GHz. [7] adopts a Y-shaped wide slot and improves the isolation by extending a length at the center. The antenna achieves a bandwidth of 14.2% with an isolation of less than -15 dB. The antenna proposed in [8] is two orthogonal dipole slots with an isolation of less than -35 dB and a cross-polarization level of less than -27 dB. By introducing the stepped-impedance structure, the antenna bandwidth reaches 38.7%. In order to realize a broadband co-planar dual-polarization antenna, this paper proposed a multi-layer slot antenna based on differential feed. Adopting wide round slots keeps the good 265 Advances in Computer Science Research (ACRS), volume 54 International Conference on Computer Networks and Communication Technology (CNCT2016)

A Broadband Multi-layer Dual-polarization Slot Antenna Based on Differential-feed