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型号： G6Y-1-DC12
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文件页数/大小： 7 页 / 212 K
品牌： ETC [ ETC ]
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 G6Y G6Y • • • Design the pattern with the shortest possible distances. Excessive distances will adversely effect the high-frequency characteristics. Bending the Micro Strip Line Strip Line with impedance Z Elbow Spread the ground patterns as widely as possible so that potential differences are unlikely to develop between the ground patterns. To avoid potential short-circuits, do not place the pattern’s leads near the point where the bottom of the Relay attaches to the board. Clip the corners 45°C When the lines must curve, an elbow can be used as shown in the diagram. A distance (D) between the lines of approximately twice the line width is sufficient. Using a Single-sided Board EXAMPLES OF MOUNTING DESIGNS When a single-sided board is used, isolation characteristics of only 60 dB to 70 dB at 200 MHz can be obtained. When high frequency bands are to be used with a single-sided board, a metal plate can be placed between the base and Relay and connected to the ground pattern. Since this example emphasizes reducing mounting costs, expensive mounting methods, such as through-hole boards, are not shown. If such methods are to be used, the characteristics must be studied carefully, using the actual board configuration. Using a Double-sided Paper Epoxy Board When double-sided paper epoxy boards are used, the dielectric constant will be approximately the same as that of glass epoxy Metal plate boards (ε =4.8). r The width of the Strip Lines for a board with t=1.6 mm is 2.7 mm for 50 Ω and 1.8 mm for 75 Ω. For a board with t=1.0 mm the width is 1.7 mm for 50 Ω and 0.8 mm for 75 Ω. The following diagram shows an example pattern, and the Micro Strip Lines connected to the contact terminals are formed with pattern widths derived from the description above. The width between the Micro Strip Lines and ground patterns are comparable to the Micro Strip Line width. Ground terminals G6Y Metal plate Printed circuit board There are jumpers between the upper and lower patterns at the points marked with Xs in the diagram. Improved characteristics can be obtained with more jumper locations. This method yields isolation characteristics of 65 dB to 75 dB at 500 MHz and 50 dB at 900 MHz. Pattern With this method a metal plate is placed between the Relay and base and connected to the pattern, as shown in the above diagram. The important point here is that 3 locations (the G6Y’s ground terminal, the metal plate’s bent tabs (A), and the ground pattern) are soldered together at the same time. This method combines an inexpensive single-sided board and inexpensive metal plate to yield the same characteristics as a double-sided board. Good characteristics are obtained by grounding the G6Y’s ground terminal and metal plate in the same place. At this point in the diagram the component side is the entire ground pattern side; but, you must set aside approximately 2.0 mm × 2.0 mm of the pattern for the contact terminals and coil terminals. Strip Line The metal plate must be attached to the base as described here. From this point, the methods used for Strip Line design are the same as for the double-sided board. G6Y Coil

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