A Planar Dual-Band Filter based on the Reduced Length Parallel Coupled Lines Seungku Lee and Yongshik Lee, Member, IEEE Sowmya Ravichandran Review paper summary: A Dual-Band Filter is obtained by cascading the reactively loaded parallel coupled lines of reduced length (< 〖90〗^0).The proposed filter have same electrical performance at both the passbands at frequencies f1 and mf1, where m is the frequency of separation between the two passbands. A complete set of design equations are derived for arbitrary number of Filter stages using standard filter synthesis technique. This provides simple, low cost and high performance filter with multiple bands. Introduction: Multiple channels are used by most of the modern communication devices. So multi band operations are of great demand in today’s communication systems. In this paper a Filter with passbands at two frequencies (f1 and mf1) is proposed. This is obtained by cascading the conventional coupled line filter with length of less than 〖90〗^0 and loading it with open circuited shunt stubs. Since the length of the coupled line is reduced, the size of the filter is reduced physically. Another advantage is that since the equations used for designing the filter is derived without using any assumption, there is no need of tuning capacitor in this circuit. Circuit Implementation: The conventional coupled line filter operates at two center frequencies when the ports 2 and 3 are grounded and the ports 1 and 4 are terminated with open circuited shunt stubs and cascading them. The shunt stubs at the cascading nodes are combined into a single shunt stub. The admittance of the stubs must be same before and after combining.RF-35 substrate with a thickness of 0.76mm and a relative permittivity of ... ... middle of paper ... ... Figure 1: Schematic of the design proposed in the paper Figure 2: Schematic and graph for the conventional design Figure 3: Graph for the design proposed in the paper Figure 4: Schematic and graph for the design 2.4GHz/10GHz design Figure 5: Schematic of the proposed model with reduced insertion loss and length Figure 6: Graph for the proposed model with reduced insertion loss and length References: [1]C.-W.Tang, S.-F.Yo and I.-C,Liu,”Design of a dual-band bandpass filter with low-temperature co-fired ceramic technology,”IEEE Trans.Microw.Theory Tech.,vol. 54, no. 8, pp. 3327-3332, Aug. 2006. [2] S.-S. Myoung, Y. Lee, and J.-G. Yook, “Bandwidth-compensation method for miniaturized parallel coupled-line filters,” IEEE Trans. Microw. Theory Tech., vol. 55, no. 7, pp. 1531–1538, Jul. 2007. [3] Microwave Engineering by David M.Pozar.
Optical monochrome filters are used to filter out all the wavelengths except desired one. Since we are interested in Green, Red and Near Infrared wavelengths the following filters are used.
The marginalization and objectification of women, often at the hands of men, manifests in life and cinema. Cinema’s representation of females is frequently placed in the hands of studios and directors (usually male lead) who continually undervalue their perspectives. Bande de filles, directed by French filmmaker Celine Sciamma, portrays the female narrative in a nuanced and complex form, using an all black ensemble as its starting point. The film centers on Marieme’s (later known as Vic) transformation from a timid teenager to a self assured women. The transformation is heavily influenced by Marieme’s new friends, an all girl gang, consisting of Lady, Fily and Adiatou, which the protagonist later joins. The relationship between females becomes
[12]: Ceramic Diesel Particulate Filters, Joerg Adler, DOI: 10.1111/j.1744-7402.2005.02044.x, International Journal of Applied Ceramic Technology ,Volume 2, Issue 6, pages 429–439, November 2005
The membrane contactors can be used in different components of the absorption refrigeration systems such as absorber, desorber, solution heat exchanger etc. In this section absorption refrigeration cycle configurations of the investigations reviewed in the present work are discussed. The principle of operation and the use of membrane contactors in the desorber of absorption refrigeration systems can alter the configuration of the cycle. However, the use of membrane contactors in the absorber has no significant effect on the configuration of the cycle. Ali and Schwerdt (2009 and 2010), Ali (2010a or 2010b or both), Yu et al. (2012) and Isfahani et al. (2013) or Isfahani and Moghaddam (2013) [To check] used the plates-and-frames membrane module absorber with the same configuration of the conventional single-effect water-LiBr absorption cycle as shown in Figure 1 (a). Schaal et al. (2008) and Chen et al. (2006) used the conventional configuration of the single-effect ammonia-water absorption refrigeration cycle using hollow fiber membrane module absorber as shown in Figure 1 (b). The no-conventional cycle configurations used in the investigations reviewed in this work are herein discussed.
In 1964 Ken Johnson and Norm McDonald started a business selling motorcycle parts and accessories to motorcycle enthusiasts. They quickly realized that there was a need for higher performance parts, and soon they began producing an air filter that could keep the fine dirt experienced in off-road racing from damaging the race engines. This filter had to be washable and reusable and allow enough air to keep the motorcycles running at peak performance. The original K&N High Flow air filter was born and in 1969 K&N Engineering became known more for its performance air filters than for rental bikes and parts. It wasn't long before the filter technology was applied to automotive applications.
Discuss the evolution of radio from the 1940’S to the present, reflecting on significant changes.
Comment on class result with respect to differences in filter types, differences in filter assemblies, and overall on the confidence you would have in using this type of sterilisation process in preparation of pharmaceutical products. List the factors that may cause contamination during filtration. (20 marks)
In the story “The Adventure of the Speckled Band” the author Conan Doyle portrays many different narrative techniques. He uses these techniques to provide meaning for the audience as well as help them visualize the situation that was being described. The different techniques used are narrative discourse, suspense, conflict, close, and focalization in his story. Narrative discourses are events, to describe a series of events that are contingent one on another. Typically focuses on one or more performers of actions. Personal experience can influence narrative discourse due to the explaining of significant events in the life of the narrator. Narrative discourse is made up of setting, developing
Today we live in a world that keeps us on the run. There is a way to get in contact with anyone at any given time. There is no such thing as ‘getting away’ because we have created a society of people that want to be found. But it is also through this technology, the same one that keeps us connected to the outside world, that we can get lost. The simplest video game can help a person escape into a different reality, spending hours on end in front of a computer screen, looking for nothing in particular on e-bay. This gets us lost. We engulf ourselves in things that have nothing to do with our daily lives because we’ve had enough, our life is too much to handle. So we focus on AIM, or video games, anything that can take us out of our life, and into something better. But then where do we draw the line? When does it become okay to spend an entire day on the computer because life was too stressful? Or, still worst, when the life we lead to get away, becomes our daily life. We lie about our lives and retell occurrences that really did not take place. Things that happened on our mental breaks become reality. These lies then have to proceed and grow, because we don’t want to be exposed. That cannot happen because that would add more stress, but what we don’t realize is that by perpetuating the lies we become more and more stressed. The exact reason we needed to get away has come back full circle. In the play Who’s Afraid of Virginia Woolf? the line between truth and illusion has very nearly disappeared. No longer does the reader know when the character is telling the truth or embellishing a lie. Even still is the character himself is being honest to his personality.
After nearly a decade of buildup and anticipation satellite radio has finally hit the airwaves. Satellite radio has been an emerging technology in the making for many years now. In 1992, the Federal Communications Commission (FCC) assigned part of the S-band (2.3 GHz) spectrum for nationwide broadcasting of a satellite-based Digital Audio Radio Service (DARS). In 1997, the FCC granted American Mobile Radio (now XM Satellite Radio) and CD Radio (now Sirius Satellite Radio) broadcast rights over...
Yamamoto K, Hiasa M, Mahmood T, Matsuo T. Direct solid±liquid separation using hollow fibre membrane in an activated sludge aeration tank. Water Sci Technol 1989;21:43±54.
Mussatti, Daniel. Fabric Filter: Reverse-air Cleaned Type, Reverse-air Cleaned Type with Sonic Horn Enhancement, Reverse-jet Cleaned Type (also Referred to as Baghouses). S.l.: S.n., 2003. Print.
The radio’s frequency is much greater than microwave, radio has 300 GHz to 3 KHz whereas microwave has 300 GHz to 3MHz.
"Lens Filters: Neutral Density." Steve's Digicams. Ed. Will Chambers. Steve's Digicams, n.d. Web. 25 Oct. 2013. .