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.
800 MHz High Power Bandpass Filter using TM Dual Mode Dielectric Resonators
A novel high power bandpass filter using TM110 dual mode dielectric resonators was developed. TM110 dual mode is achieved with dielectric resonators physically coupled in an asymmetrically orthogonal manner and these arrayed resonators are constructed in monoblock and have high unloaded Q. By assembling these resonators, an 800 MHz high power bandpass filter was realized. Specific features achieved with this new filter are, center frequency of 840 MHz, band width of 40 MHz, and insertion loss of 0.4 dB. Physical size is 80×90×180 mm. Volume is less than 30% of conventional type high power bandpass filter using cavity resonators. This filter is useful as an antenna filter for cellular base stations.
Same-Sex Marriage in the United States
This Chapter gives a brief analysis of the status of same-sex marriage in the United States prior to the US Supreme Court decisions of 2013 and the status of litigation and political reforms triggered in part by these court decisions. It shows that marriage is a central institution in the country’s rationale of family law in ways that separate it from other western countries that have allowed same-sex marriage.