Multi-Access Antenna Layout for Compact Wideband Direction Finding

The patent combines multiple radiating elements into a single integrated antenna structure where conductive parts serve multiple functions: they form both vertical and horizontal polarization patterns, provide impedance adaptation, and create sectoral radiation. This merging allows achieving polarization diversity and improved direction finding accuracy without proportionally increasing the antenna volume.

The conductive parts in the antenna design serve multiple functions simultaneously: they radiate electromagnetic waves in multiple polarizations, provide impedance adaptation through their geometric configuration, and create the necessary phase differences for direction finding. This multi-functionality reduces the need for separate components, thereby reducing overall system volume while maintaining measurement precision.

The antenna structure uses its own geometric configuration - specifically the arrangement and dimensions of conductive parts relative to each other - to provide passive impedance adaptation. The conductive parts are positioned and sized such that their mutual coupling and interference patterns naturally create the desired impedance characteristics across the operating bandwidth, eliminating the need for active impedance matching circuits.

The patent achieves impedance adaptation by carefully controlling geometric parameters of the conductive parts - their lengths, widths, spacing, and relative positions. By optimizing these physical dimensions, the antenna presents the desired impedance to the feed line across a wide frequency range without requiring active components or complex matching networks.