Kansheng Yang

A Simple Polarization Reconfigurable Printed Monopole Antenna

A simple polarization reconfigurable printed monopole antenna is proposed for wireless applications. Conducting strips are used to connect to the ground plane providing the necessary additional modes for circular polarization. Linear polarization, right-hand or left-hand circular polarization can be realized using only two PIN diodes, which connect to the ground plane, minimizing their effect on radiation characteristics. The mechanism is described, and key antenna parameters are studied and optimized. The antenna is prototyped and tested for all polarization configurations.

Amorphous Silicon Solar Vivaldi Antenna

An ultrawideband solar Vivaldi antenna is proposed. Cut from amorphous silicon cells, it maintains a peak power at 4.25 V, which overcomes a need for lossy power management components. The wireless communications device can yield solar energy or function as a rectenna for dual-source energy harvesting. The solar Vivaldi performs with 0.5-2.8 dBi gain from 0.95-2.45 GHz , and in rectenna mode, it covers three bands for wireless energy scavenging.

A back-to-back beam switching microstrip patch antenna

A back-to-back linearly polarized patch antenna with a single microstrip line feed is proposed for WLAN applications. The antenna consists of two identical rectangular patch elements on the front and rear sides of a common ground plane. One patch antenna can be switched on at a time using a single-pole double-throw PIN diode switching circuit, offering a switched pattern angle of 180° in the Z-axis.

A coplanar vivaldi antenna with integrated filter for Ka-band

A new design approach of a dual-stub coplanar Vivaldi antenna with integrated filter is presented. The dual-stub excites coupling between a parasitic elliptical element and tapered slots. The dimensions of the parasitic element are studied and optimized for wide beamwidth. The band pass filter is used for sub harmonic suppression and pattern shaping.

A dual band 450LTE/GSM900 PIFA for portable devices

A dual band PIFA antenna for portable devices is presented. It operates in the 450 LTE (449-461 MHz) and GSM 900 (876-922 MHz) frequency bands. The proposed antenna which has a very compact size of 7 (0.01λ₀) × 7 × 70 (0.1λ₀) mm³, consists of two branches and a metallic patch and is suitable to integrate in small envelopes. The low cost antenna offers high total efficiency and gain in both bands. Measured and simulated results are provided.

Dual band printed antenna for M2M applications in ISM and GSM bands

A dual band antenna for machine-to-machine applications in ISM and GSM bands is presented. The antenna is compact and operates at 409-442 MHz and 800-1224 MHz, with good efficiency and gain across the frequency bands. A parametric investigation of key geometrical parameters is reported.