Basic Qualification · B-006 Feedlines and antenna systems · B-006-013-007
You are constructing an HF delta loop antenna. It is oriented with the bottom element parallel to the ground. Where should you locate the feed point for horizontal polarization?
- A On a side element, one quarter wavelength from the top
- B In the centre of the bottom element
- C In the centre of a side element
- D At a junction of the bottom element and a side element
Correct answer: B — In the centre of the bottom element. From the official ISED question bank, verified word for word.
Why
To achieve horizontal polarization with a delta loop where the bottom wire runs parallel to the ground, you must feed the antenna at the centre of that bottom element. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.