Voltage and current may be compared to assess transfer impedance. Both current and the induced potential between coaxial center conductor and ground are displayed on a spectrum analyzer (Figures 3 and 5). A bulk cable injection (BCI) clamp induces an RF potential on the cable shield, and a current probe monitors the resultant current at the connector of interest. LMR-195 50 Ω coaxial cable with an N connector at one end and SMA at the other has its termination bonded to a ground plane at each end. This is achievable with a cable using a threaded connector such as SMA, and then adapting to other threaded and bayonet connectors, as was done in this investigation.įigures 2a, 2b, 2c, and 2d show the measurement. The optimal way to achieve that is to use the same exact cable, and change connectors. Therefore, if evaluating the transfer impedance contribution of one connector versus another, it is critical that the shield component of transfer impedance be constant.
#Bnc connector series#
These two components of total transfer impedance are in series with each other and add linearly. Transfer impedance measurements on cables evaluate the performance of the cable shield as well as that of the connectors. 1 Coaxial Cable Used as Part of the Radiated Measurement System: Transfer Impedance Measurements And as a fringe benefit, we find that BNC connectors can make serviceable connector savers for smaller diameter cables terminated in fragile SMA connectors. The balance of this Tech Tip presents data substantiating the preceding statements. So, perhaps counter-intuitively, BNC connectors leak less from the outside in than from the inside out. And it turns out that certainly in the rod and biconical antenna ranges a BNC connector is suitable for this application and doesn’t leak much more than a threaded connector as long as it isn’t defective. And if the induced external cable current gets inside the coaxial transmission line, it will corrupt the radiated measurement. The issue there is transfer impedance because the potential problem with a leaky connector is that the same field that impinges on the antenna will also impinge on the coaxial connection to the receiver. But that isn’t the actual problem when the BNC connector is on an antenna. If you aren't sure which connectors are best for your specific needs, you can always contact one of our customer service representatives for expert advice.Figure 1: Measurement of connector leakageĪ measurement like that shown in Figure 1 will indeed verify The Rule. Check out our selection of wholesale BNC crimp connectors (available with 100 sets per bag) or get amazing, low prices on 10-piece bags of BNC compression connectors that are designed to help you easily terminate coax cables while creating a seamless, air-tight connection. If you're looking for a super-affordable way to stock up on reliable bulk BNC connector parts, look no further than CableWholesale! We can help you order bulk BNC coax connectors and cables for even massive jobs. We also have coaxial BNC adapters and converters that allow you to convert certain connectors from male to female, as well as mount couplers that let you connect to BNC cables for use in a panel system or to extend cables. Our BNC crimp connectors are designed to add a crimp connector (the end component) to a BNC coax cable, which can be useful if you’re testing or repairing old cables.
We have the perfect BNC connector for a range of needs and applications. Most of our BNC coax connectors come backed by a lifetime warranty to protect your purchase. No matter which type of BNC coax connector, cable, or adapter you need, you can expect low prices and excellent products when you shop with CableWholesale. Our large inventory includes bulk BNC connectors, BNC female crimp connectors, SMA female to BNC male adapters, BNC right angle adapters and a wide variety of other useful products. These connectors are typically used with BNC coaxial cable - including RG59 and RG6 coaxial cables - and feature quick connect and disconnect designs for added convenience.
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