center frequency

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center frequency

[′sen·tər ′frē·kwən·sē]
(communications)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Reference Center frequencies of 3 dB fractional Insertion the passbands (GHz) bandwidth (%) loss (dB) [11] 5.85/6.15 1.3/1.3 2.2/2 [12] 5.3/8.7 6.8/3.2 1.8/1.94 [13] 4.8/5.4 3.8/3.9 1.2/1.3 [14] 9.4/9.98 3.1/3.7 2.24/2.01 This work 5.4/10.1 17.2/55.2 1.1/1.4 Reference Size [11] 2.11[[lambda].sub.0] x 2.11[[lambda].sub.0] [12] 0.73[[lambda].sub.0] x 0.73[[lambda].sub.0] [13] 1.38[[lambda].sub.0] x 0.78[[lambda].sub.0] [14] 2.67[[lambda].sub.0] x 2.64[[lambda].sub.0] This work 0.59[[lambda].sub.0] x 0.51[[lambda].sub.0] [[lambda].sub.0] is the guided wavelength at the center frequency of the first passband.
The center frequencies and bandwidths can be obtained by (16) and (17).
The desired weak light detection is implemented simply by probing the shifts of the center frequencies of the dips.
When RXE is compensated, we obtain M frame focused images with different center frequencies and (8) becomes
Finally, return loss and center frequencies before and after adjustments are summarized in Table 2.
Both of the center frequencies are tunable, and the first frequency is centered at 1.57 GHz for globe position system (GPS) while the second passband is set at about 4.65 GHz for microwave radio relay communication (MRRC), as shown in Figure 3.
Whatever, all the center frequencies of these conventional wideband microstrip ring resonator BPFs [6-11] center at the fundamental resonance of the ring resonator.
The widest frequency range over which the system has been used to acquire data is the range of one-third-octave bands with center frequencies from 200 Hz to 8000 Hz.
The RF input frequency range extends to 6 GHz and provides a capture bandwidth of greater than or equal to 1 GHz at all center frequencies. Users can also see up to four decoded serial and/or parallel buses at one time on the same display, so they can make accurate timing measurements to understand delays and latencies between command/ control events in their design and changes in the RF spectrum.
Lower center frequencies and narrower bandwidths take longer to settle.

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