1.9 GHz Compact Low Loss Dielectric Duplexer Designed by Dual Mode Waveguide Transmission Line Method
A new small sized and low loss 1.9 GHz band dielectric duplexer has been developed. 1.9 GHz TM110 dual mode monoblock dielectric resonators, which designed to have much smaller volume (27 cc) and high unloaded Q(5000), have been constructed by using new precise molding techniques. And to insure that we are able to simulate and design optimized electrical performance of the duplexer accurately, we have proposed a dielectric dual mode waveguide transmission line design, method. The duplexer thus designed and manufactured has excellent performanc. The volume is 200 cc, insertion loss is 0.45 dB, and attenuation is 85 dB.
Compact duplexer using capacitive loaded dual mode resonator for GSM microcellular base station
This paper describes a compact dielectric resonator duplexer for GSM microcellular base station. A new size-reduced capacitive loaded TM dual mode resonator that consist of monoblock high K ceramics is proposed. The electrical performance of the duplexer is designed by using elliptic type equivalent circuit method. A 6 pole type duplexer at 900 MHz band is manufactured. It has low insertion loss of 1.1 dB, high attenuation of 58 dB. The volume is about 318 cc that is 1/3 of conventional cavity type.
Fruit machine gambling: The importance of structural characteristics
Determinants of the decision to gamble not only include the gambler's biological and psychological constitution but also the structural characteristics of the gambling activity itself. Such characteristics may be responsible for reinforcement, may satisfy gambler's needs, and facilitate excessive gambling. Showing the existence of such relationships has great practical importance. Not only could potentially ‘dangerous’ forms of gambling be identified but effective and selective legislation could be formulated. This paper outlines a history of the importance of structural characteristics in fruit machine gambling and then discusses the role of a number of distinct characteristics including pay out interval, multiplier potential, better involvement, skill, win probability, pay out ratio, suspension of judgement, symbol ratio proportions, the near miss, light, colour, and sound effects and naming. These are all examined in relation to the gambler's behaviour and/or cognitions. It is shown that structural characteristics of fruit machines have the potential to induce excessive gambling regardless of individuals' biological and psychological constitution and that such insights may help in decreasing fruit machine gambling's “addictiveness” potential and help in formulating effective gambling policy.