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PPI display in an aircraft over a coastline facing p
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aerial aircraft amplifier amplitude anode aperture array attenuation bandwidth beam capacitance cathode ray tube cavity cavity resonators centimetres centre characteristic impedance circuit circular coaxial line components conductor constant coupling critical wavelength crystal cylinder decibels dielectric dimensions diode dipole direction distance distribution echo effect electric field electron elements energy equal equation factor feed feeder Figure gain given gives grid half wave horn increased inductance input intermediate frequency klystron length linear load local oscillator magnetic field magnetron matching maximum measurement megacycles per second method metre microwave mixer mode modulator noise obtained ohms operation oscillator phase plane Plate polar diagram potential produce propagation pulse forming network radar radiation radio frequency range reactance receiver rectangular reflected reflector resistance shown in Fig signal slot space standing wave ratio switch target transformer transmission line transmitter triode valve velocity voltage waveform waveguide wavelength zero