A Pulse Compression Filter Employing a Microwave Helix |
Common terms and phrases
18 inches aquadag band of frequencies bandwidth center frequency center traces show COMPRESSED AND UNCOMPRESSED compressed pulse width compression filter coupling helix db above uncompressed db points delay vs frequency desired dispersion dielectric dispersion curve dispersive helix expanded view free space frequency characteristic frequency curve function of frequency Gaussian glass group velocity helical couplers high frequency inches of helix input pulse width insertion loss Karp circuit L Band length of helix linear low frequencies lower trace Mc band microwave frequencies nanoseconds per division nonsweeping signals nsec optimum compression oscilloscope outer helix Output coupler output pulse width phase velocity PHOTOGRAPH SHOWING EFFECT PULSE COMPRESSION PULSES WHEN BANDPASS quency rate of 20 ratio of compressed shorted stub shown in Fig Signal sweep rate slotted line STRIPLINE BANDPASS FILTER structure sweeping pulse sweeping signal theoretical transfer function traveling wave tube uncompressed and compressed uncompressed pulse amplitude upsweeping VSWR x 1016 cycles/sec²