High-Gain Wideband Integrated-Feeding Filtenna Enabling Frequency-Interference-Resilient Heterogeneous IoV Network

A co-design of wide-band, high-gain, filtering, and single-feeding method is proposed to meet the demand of multifunctional antenna for Internet of Vehicles (IoV) applications. This single antenna enables the IoV communication to operate across multiple frequency bands within a long distance simultaneously, while maintaining frequency-interference-resilient performance. The metasurface (MS), composed of 4 × 4 rectangular patches, is centered on the substrate. To improve the bandwidth and gain, a pair of dipoles are placed on two sides of the MS to form a hybrid antenna with three resonant modes. At the same time, the MS and the dipoles produce the 1^st radiation null. The MS is fed by a slot line, and two dipoles are fed by two U-shaped microstrip lines. The two feeding structures are mixed together through the microstrip-slotline-microstrip transition with a single exciting port. Two pairs of coupled lines (CL 1 and CL 2) are used to increase the steepness at the edges of the passband, which can produce 2^nd and 3^rd nulls. Two open-circuit microstrip lines are added to the feeding line to generate 4^th, 5^th, and 6^th nulls, which can further suppress the out-of-band low- and high-frequency radiation capabilities. The proposed antenna has an impedance bandwidth (IMBW) of 33.9%, a high gain of 9.9–11 dBi within the passband, and an out-of-band suppression width of 1.93ƒ₀ © 2026 IEEE.