Name three common antenna types suitable for a manpack radio and give one use case for each.

• A. Quarter-wave whip for general portable use; Dipole for balanced feed and compact setups; Ground-plane or top-loaded monopole for mobile or mast-mounted operations.
• B. Parabolic dish for long-range links; Yagi for fixed rooftop install; Slot antenna for handheld operation.
• C. Loop antenna for portable use; Helical antenna for ground-based radar; Panel antenna for high-power mobile.
• D. Wire dipole for marine use; Beverage antenna for urban comms; Dipole for vhf.

Answer: (A)

In manpack radio operations, you want antennas that are lightweight, quick to deploy, and efficient across the bands you’ll use. The three types described fit those needs well and cover typical field scenarios.

A quarter-wave whip is a simple vertical radiator sized roughly to a quarter of the wavelength of the target band. It’s easy to carry and set up in the field and is well suited for general portable use where you need a ready-to-go antenna without special mounting. Its performance is good for quick, on-the-move communications, especially when you have a suitable counterpoise or ground plane nearby.

A dipole provides a balanced feed with two equal radiator elements. Because it uses a two-piece radiator and balanced feed, it often delivers clean radiation and good efficiency in compact installations where a full-sized mast isn’t available. It’s a natural choice when you can set up a small support structure for the ends or suspend it between two points, giving solid performance without relying on a vehicle’s metal surface.

A ground-plane or top-loaded monopole needs a conductive counterpoise (ground plane) or a mast to work effectively, but it becomes particularly advantageous when you have a vehicle or fixed mast to provide that counterpoise and extra height. The top-loading helps electrically lengthen the radiator in limited space, improving low-frequency efficiency and overall gain for mobile or mast-mounted operations.

Parabolic dishes, Yagi, slot, and similar high-gain or specialized antennas are generally not the go-to for a compact, manpack setup because of size, weight, and deployment considerations, whereas the three above strike a balance between portability and performance across typical field uses.

In short, the quarter-wave whip covers general portable use, the dipole fits compact setups with a balanced feed, and the ground-plane or top-loaded monopole excels in mobile or mast-mounted scenarios.