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X3C25F1-02S Datasheet(PDF) 9 Page - Anaren Microwave |
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X3C25F1-02S Datasheet(HTML) 9 Page - Anaren Microwave |
9 / 18 page ` Available on Tape and Reel for Pick and Place Manufacturing. USA/Canada: Toll Free: Europe : (315) 432-8909 (800) 411-6596 +44 2392-232392 Model X3C25F1-02S Rev D PRELIMINARY the interface pad will have less capacitive reactance than the Anaren test board. In this case, a wider section of line before the interface pad (or a larger interface pad) will introduce a shunt capacitance and when properly tuned will match the performance of the Anaren test board. Notice that the board layout for the 2dB, 3dB, 4dB and 5dB couplers is different from that of the 10dB and 20dB couplers. The test board for the 2 to 5dB couplers has all four traces interfacing with the coupler at the same angle. The test board for the 10dB and 20dB couplers has two traces approaching at one angle and the other two traces at a different angle. The entry angle of the traces has a significant impact on the RF performance and these parts have been optimized for the layout used on the test boards shown below. Ø.015 THRU HOLE 2x .065 .025 TYP 4x .040 (1.930) .140 (2.290) 2dB- 5dB Coupler Test Board Testing Sample Parts Supplied on Anaren Test Boards If you have received a coupler installed on an Anaren produced microstrip test board, please remember to remove the loss of the test board from the measured data. The loss is small enough that it is not of concern for Return Loss and Isolation/Directivity, but it should certainly be considered when measuring coupling and calculating the insertion loss of the coupler. An S- parameter file for a “Thru” board (see description of “Thru” board above) will be supplied upon request. As a first order approximation, one should consider the following loss estimates: Frequency Band Avg. Ins. Loss of Test Board @ 25C 869-894 MHz ~0.092dB 925-960 MHz ~0.095dB 1805-1880 MHz ~0.166dB 1930-1990 MHz ~0.170dB 2110-2170 MHz ~0.186dB 2000-2500 MHz ~0.208dB 2500-3000 MHz ~0.240dB 3000-3500 MHz ~0.270dB 3500-4000 MHz ~0.312dB It is important to note that the loss of the test board will change with temperature and must be considered if the coupler is to be evaluated at other temperatures. |
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