What might a "split-ring on a printed-circuit board" antenna for 144 MHz on a downward-looking Space Shuttle window look like? How big would it be?

Question

This excellent answer to First Ham Radio contact from space; what frequency, what kind of antenna, and how did they route the coax out the window? in Space Exploration SE contains the block-quoted material below.

Question: What might a "split-ring on a printed-circuit board" antenna for 144 MHz transmitting through a downward-looking Space Shuttle window look like? How big would it be?

---

This happened on the first Spacelab flight, STS-9.

The antenna (split-ring on a printed-circuit board) will be placed in the upper crew compartment window on the aft flight deck.

Source, NASA Educational Brief for the Classroom, STS-9 and Amateur Radio_ This document gives a detailed writeup on the operations.

(Owen) Garriott is pictured in JSC's Building 9 One-G Trainer with the handheld unit. The edge of the Orbiter starboard overhead window is visible behind him.

Source, NASA Photo

Answer 1

I went looking for photos of W5LFL operating in orbit that included a view of the antenna in the window, but I couldn't find any. I did find NASA Photo S83-36894: which is described as "Astronaut Owen Garriott in Ham Radio simulation in One-G trainer in bldg 9A" and I think there's a pretty good chance that the white thing in the lower-right corner of the window is the antenna.

No construction details are visible, but we can at least get an idea about the size: the aft viewing windows, according to NASA materials, were 14.5" x 11" (368 x 279 mm). Assuming the thing we see in the photo I found, it seems to be about half the size in each dimension (~ 180 x 150 mm). Even if that's not it, it probably wasn't bigger than the window.