________ are very efficient in a frequency range of 3-300 GHz.

Related MCQs

• Capacitors are used for audio frequency and radio frequency coupling and tuning.
• Wave speed in terms of frequency f and wavelength λ is expressed as _________.
• In a distortionless line, attenuation constant α is frequency _________.
• Below the cut-off frequency, there is_______________.
• Resonant frequency of an antenna depends upon its___________.
• The capacitor preferred for high frequency circuits is
• capacitors are mainly used for radio frequency tuning.
• The Smith chart represents a family of circles obtained by varying normalized resistance in the range of __________.
• A family of arcs is obtained in the Smith chart by varying normalized reactance in a range of __________.
• Smith charts depict a wide impedance range of transmitter for _______VSWR.