# A 26.2:1 Bandwidth Ultra-Wideband Low-Profile Tightly Coupled Dipole Array with Integrated Feed Network

## TL;DR

A new ultra-wideband dipole antenna array with a very low profile and simplified feeding is developed for improved performance.

## Contribution

A novel tightly coupled dipole array with a 26.2:1 bandwidth and an integrated feed network is introduced.

## Key findings

- The TCDA achieves a 26.2:1 bandwidth (0.20–5.23 GHz) with VSWR < 3.
- The integrated feed network reduces complexity and lowers the profile height to 0.05 λlow.
- The design improves gain, bandwidth, and feeding simplicity compared to previous antennas.

## Abstract

What are the main findings?

New structure dipole antenna.Minimalist feeding method.

New structure dipole antenna.

Minimalist feeding method.

What is the implication of the main finding?

Dipoles close to each other in an arc shape between elements, making the mutual coupling and bandwidth increase greatly.The specially designed feed network makes the feed mode greatly simplified and the profile height extremely low.

Dipoles close to each other in an arc shape between elements, making the mutual coupling and bandwidth increase greatly.

The specially designed feed network makes the feed mode greatly simplified and the profile height extremely low.

This article presents a novel tightly coupled dipole array (TCDA) with a bandwidth of 26.2:1 (VSWR < 3) across 0.20–5.23 GHz. By adding a new dual-stopband resistive frequency selective surface (RFSS) between the dipole and the floor, the short-circuit points formed by the floor at the frequency points corresponding to λ = 2 h and h are both eliminated (h is the height from the antenna to the floor). A specially integrated feed network is also applied to significantly reduce the complexity and profile height to 0.05 λlow. The simulation and experimental results show that the designed TCDA has extremely wide bandwidth, good directivity and beam scanning potential. Compared with previous designs, it greatly extends the bandwidth, improves the gain, reduces the profile height, and simplifies the feeding method.