- Microwave devices--Congresses (14)
- Wireless communication systems--Congresses (9)
- Optoelectronic devices--Congresses (3)
- Telecommunication--Equipment and supplies--Congresses (3)
- Millimeter waves--Congresses (2)
- Free electron lasers--Congresses (1)
- Gyrotrons--Congresses (1)
- Optical instruments--Congresses (1)
- Optical wave guides--Congresses (1)
- Submillimeter waves--Congresses (1)