A Compact Dual-Band Self-Diplexing MIMO Patch Antenna for ISM and X-Band Communications

Abstract

A compact, dual-band, and self-diplexing MIMO patch antenna with a shared aperture is presented for Industrial scientific medical (ISM) band and X-band communications. The structure consists of two orthogonal feed lines and a rectangular slot in a square patch. The size of the FR4 substrate is 50 x 50 x 1.6 mm 3 . The designed structure operates at 5.8 (ISM) and 8 GHz (Xband) frequencies independently with a simulated peak gain of 5.46 and 3.59 dBi respectively. A 13 dB of isolation is obtained for the two orthogonal ports. The obtained frequency ratio range is 1.20-1.33 over the reflection bandwidth. The design structure is fabricated and validated experimentally. The compactness and promising performance in terms of low ECC (Envelope Correlation Coefficient) (<0.1), high peak gain can make the proposed antenna a choice for current wireless devices.

Semicircular Slot Based Uwb Microstrip Patch Antenna for Variable Band Notched Applications

“…Although UWB technology offers numerous advantages, one challenge is to build an UWB antenna that is small, with appropriate impedance with good radiation stability and efficiency and a reduction of signal interference in the UWB frequency spectrum with achieve narrower bands [3]- [7]. The superimposed lower 5G frequency band (3.4-3.7) GHz [8], Wi-MAX (3.3-3.8) GHz, WLAN (5.15-5.825) GHz, X-band (7.9-8.4) GHz [9], [10] and ITU 8 GHz at (7.725-8.275) GHz operating connections [11]- [15] within the UWB bandwidth. In this article, a UWB antenna will be equipped with a variable band notch function with Wi-MAX (3.3-3.8) GHz and 5G lower band (3.4-4) GHz applications.…”