Density of Heavy Water
THE density of heavy water was accurately determiner oy Stokland, Ronaess and Tronstad1 rature range 10–27°. Measurements fed to 50° by Chang and Chien2, and later by Wirtz3. Recently, we have further extended the measurement up to the boiling point of heavy water.
The high pressure PVT properties of deuterium oxide
The high pressure isothermal compressibilities of deuterium oxide from 5 to 100 °C and 0 to 1000 bars applied or gauge pressure were determined from sound speed data. These compressibilities were used to derive an equation of state of the form V0P/(V0 − VP) = B + A1P + A2P2, where V0 and VP are the specific volumes at an applied pressure of zero and P; and B, A1, and A2 are polynomial functions of temperature. The compressibilities derived from this equation of state are consistent with those derived from the sound speed data to ±0.016×10−6 bar−1 over the entire pressure and temperature range (this is equivalent to ∼0.2 m sec−1 in sound speed). The 1 atm sound‐derived compressibilities agree on the average to ±0.06×10−6 bar−1 with the direct measurements of Millero and Lepple. The P–V–T data from the sound‐derived equation are compared with the high pressure work of Bridgman, Kesselman, Juza et al., and Emmet and Millero. Good agreement (average deviation of ±28×10−6 cm3 g−1) was found with the recent spe...
Third order nonlinear distortion of SAW duplexers in UMTS system
Nonlinearity distortion characterization and accurate modeling techniques for leaky surface acoustic wave (LSAW) devices have been desired in the recently years due to the applications of the Radio Frequency (RF) SAW duplexers in the third-generation (3G) telecommunication system, such as Universal Mobile Telecommunications System (UMTS). In the work, we first discuss the approaches to measure and characterize the 3rd order harmonic generation of the resonators on lithium tantalate YXl42° wafer and YXl48° wafer, with resonance frequency of 800MHz to 900 MHz; Second, we present an effective nonlinear Butterworth-van-Dyke (BVD) model to simulate the multi-tone 3rd order intermodulation effects of a band 5 duplexer; simulation result vs. measurement of 3rd order harmonic generation, 3rd order intermodulation (IMD3) and triple beat are presented.