Labels:barrier reef | crt screen | earth | oscilloscope OCR: 10k X/R 25000 /R 250 /4 3X/4 5/4 HALF-LENGTH OF ANTENNA X/R 25000 /R =250 3X14 5/4 HALF-LENGTH OF ANTENNA Figure 1. Dipole resistance and reactance Impedance variation of two dipoles of the same length, but different diam- eter Ais the feedpoint resistance and B the feedpoint reactance Note the insensitivitv of feed resistance to diam eter at the quarter wave resonance points, and the shift in resonant frequency with diameter The patterns repeat each additional half wave with both resistance ano reactance reaching constant value 3X74 HALE insensitivity
