The main limitation of a sold state microwave device is its surroundings. The microwave tower needs to be tall enough to overcome trees and other objects getting in the way of transmission.

Transistor, Microprocessor, LCD etc.. are the solid state component or device. The device which is made by all these and other same solid state component is called solid state device.

Thomas S. Laverghetta has written:

'Modern microwave measurements and techniques' -- subject(s): Microwave measurements, Microwave devices

'Microwave materials and fabrication techniques' -- subject(s): Materials, Microwave circuits

'Microwaves and Wireless Simplified'

'Solid-state microwave devices' -- subject(s): Solid state electronics, Microwave devices

A CD drive has moving parts and therefore cannot be considered solid state.

Nothing. An led is a solid state device.