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Cable resonance narrowband time-domain waveform

Section, but it seems to cover up the contradictions. Key words: cable resonance; 1 INTRODUCTION Time Domain RF coaxial cable of the production process is an automated process, the periodic error will lead to more or less the appearance of a frequency of the cable under the relatively large standing wave phenomenon, due to similar resonance curve,[link widoczny dla zalogowanych], so called cable Resonance [Il. Resonance phenomenon occurs when the cable is the time domain waveforms do? Is tested by conventional broadband? Or near the resonant frequency for narrowband time-domain test? To this end, typical of the two cables on the test, the test results are as follows : 2 a sW test curve for a 50-3 cable (cable length 5 m) standing wave field map than a 36 I am a SYv a 5o-3 cable test curve Zooooo VSWR bandwidth of 16MII ~ Figure 2 test of time domain waveform of Figure 3,[link widoczny dla zalogowanych], test bandwidth I6olI Ⅱ time domain waveform of the first antenna technology, plus set ● ● ¨ ¨, c_l, I-■ ● ● Z8. ooo × ZoOe5 ● 2O ● OOOOOZoo. A oo × ZoZoo. ooo one hundred eleven thousand one hundred and eleven --. O-nO -. O22 ● ● OO ● ● ● ● ● ● mouth mouth mouth to mouth when the time-domain domain o. O ・ O Summer o'0 .030.020.010.00 Figure 4 test bandwidth 1600MI-h 3 in a time-domain waveform of a RG 400 cable test curve (cable length 2 m) is O ・ 25 domain O. The first set of antenna technology 2o 2o O. 1 guided O. 1OO. O5O. OO Figure 5, the cable 400 a Rc a test curve of Figure 6 VSWR bandwidth of 32Ml-lz test the time-domain waveform in Figure 7 test bandwidth time domain waveform of 320MHz Zm distressed 't-: 0 × qZo a 37 A ● ● \J_-_ - '-n an ● ● Xiao -. N, standing wave ratio. Z a ooo × ZoZo,. oo × ZoZoo.ooo one hundred eleven thousand one hundred and eleven .. ● ... 2 ● OOOOOOOOOOOOO time-domain graph 8 test bandwidth 3200Ml-Iz the time-domain waveform 4 Conclusion - as acceptance test to use the frequency domain. - near the resonant frequency for narrowband time-domain testing, will highlight the contradictions, but the resolution is poor. * test using the maximum bandwidth time, although the substance of the issue can be found, but it seems rather cover up the contradictions. According to experience,[link widoczny dla zalogowanych], reflecting the distribution of cable r greater than 0.01 is best not to choose. as shown in Figure 2,3,4,[link widoczny dla zalogowanych], then a good conclusion next. view Figure 6,[link widoczny dla zalogowanych],7, RG 400 cable is not a good look by Figure 8, it can not determine the cable is not good. Therefore, check the cable for the time-domain tests, although the theoretical point of view by the time domain the more bandwidth the better, but this is not as widely as possible. References 1 Hu Shuhao. Practical RF technology. Electronic Industry Press ,2004.1-38 20 day line technology set l, I4Z inch bamboo a l10XZo
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