(2) Multi-parameter and multi-objective optimizations of the high precision membrane antenna structures should be performed considering the membrane material creep property and structural nonlinearity.
Recent advances in structural configurations, tensioning system design, and dynamic analysis for planar membrane antenna structures are investigated.
These waves, though shorter than those employed in earlier systems, necessitate antenna structures about 100 feet (30 metres) long on the ground.
The antenna structures can be moved in any direction, making it possible to track a celestial object in different regions of the sky.
The Italian physicist Guglielmo Marconi, the principal inventor of wireless telegraphy, constructed various antennas for both sending and receiving, and he also discovered the importance of tall antenna structures in transmitting low-frequency signals.
This instrument, built in the early 1960s, employs a 305-metre (1,000-foot 1,000-foot reflector consphericalf pereflectoraluminum panels that foconsistingng radiofwaves on movable antenna structures perforated aluminum8 metres (550 feet) above the reflector surface.
Space-borne membrane antenna structures are mainly classified as either parabolic or planar membrane antenna structures.
Material choices for antenna structures represent a significant challenge.
At present, there are two main kinds of space-borne membrane antenna structures: parabolic and planar membrane antenna structures.
Therefore, it is necessary to perform dynamic analysis on planar membrane antenna structures.
As different antennas have different antenna structures and physical characteristic, their antenna gain functions are different.
