Without directional antennas, the 15,000 or so full-power AM radio stations in the United States at its peak would not have been possible. If the AM band ever goes completely away we’ll be sad ...

Abstract: Recently the FCC amended its remote-control rules to include stations having powers greater than 10 kw or a directional antenna. A directional station applying for remote-control privileges ...

When you think of directional ham radio antennas, you probably think of a Yagi, cubical quad, or a log-periodic antenna. These antennas usually are in a horizontal configuration up on a high tower.

The problem is usually worse in stereo mode than in mono. A directional roof–mounted antenna can often help. AM signals are prone to interference by a variety of technical sources: other radio ...

Abstract: In this paper, we examine a number of issues relating to the inter-HAP handoff process for broadband communications that operate with fixed or steerable directional antennas, allowing a ...