Low Profile Orthomode Full-Duplex Antenna for Wearable Biomedical Communication

Low Profile Orthomode Full-Duplex Antenna for Wearable Biomedical Communication

Blog Article

A low-profile monolayer dual-port orthomode antenna is presented for enhanced in-band full-duplex (IBFD) communication of wearable biomedical devices.The proposed antenna consists of a center patch surrounded by a complementary slot within a larger peripheral patch.The two ports, which are at opposite lateral sides in a coaxial configuration, are responsible for the Tx/Rx channels respectively.By implementing an asymmetric displacement from the geometric axis, an odd surface current mode is excited via Port 2 knowall.blog (Rx mode), while the even mode is achieved through Port 1 (Tx mode).This mode orthogonality implementation allows a high isolation of > 35 dB between Tx/Rx channels across the central frequency of 6 GHz without circuit elements.

In addition, a −10 dB bandwidth of 280 MHz (4.7%) and 480 MHz (8%) is achieved for redken shades 9gi Port 1 and 2 respectively which supports stable communication channels.The antenna is verified to simultaneously support a unidirectional radiation pattern towards the broadside (Port 1) and a multidirectional hybrid radiation pattern (Port 2) composed of bidirectional $y$ -pol radiation (120° and 60°) as well as broadside $x$ -pol radiation.Both Tx/Rx channels achieve a large front-to-back ratio of > 15 dB.The free space characterization results agree well with the full-wave simulations.

Furthermore, the odd/even modes are determined to be stable under local deformations and human loading effects.In conclusion, this monolayer orthomode full-duplex antenna is suitable for various wearable applications due to its low-profile, highly manufacturable design and robustness to environmental imperfections.