This website uses cookies to ensure you have the best experience. Learn more

A Planar Dual Band Filter Based On The Reduced Length Parallel Coupled Lines

1055 words - 5 pages

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 ...view middle of the document...

8421〗^0 and the frequency of separation m is 2.167.The bandwidth is found to be 192MHz for both the frequency which is 8% of 2.4GHz and 3.69% of 5.2GHz.
Conventional Design: A conventional bandpass filter is implemented when the coupled line of electrical length equal to 〖90〗^0 is cascaded at ports 1 and 4. The ports 2 and 3 can be made open or short. This design operates only at one frequency (f1).The equation for designing this filter is derived by even and odd mode analysis. The bandwidth of the filter with dual band is less compared to the conventional filter with single frequency of operation. This reduction in bandwidth is due to the Shunt stubs which are used to load the parallel coupled lines.
Novel Design: The electrical length of the coupled line is reduced to 〖34.84〗^0 . This decrease in length can be obtained only by increasing the frequency of separation m to 4.167.Hence the passband frequencies thus obtained are 2.4GHz and 10GHz.The even and mode impedances of the coupled line and the impedance of the shunt stub are calculated using the filter design equations. The shunt impedance value is found to be decreased when compared to filter with length 〖56.8421〗^0.The bandwidth at both the frequencies are increased to 216MHz for a filter with 9% fractional bandwidth at 2.4GHz and 2.16% fractional bandwidth at 10GHz.Thus a reduced length filter would have increased bandwidth and decreased stub impedance. A graph is plotted for frequency Vs insertion loss. The insertion loss is found to be 0.66dB at 2.4GHz and 19.8dB at 10GHz.A better insertion loss of 2.9dB is obtained with a little shift in the frequency at 12.1GHz.

Table 1: 2.4/10GHz Dual band filter
Z_(e,n) (Ω) Z_(o,n) (Ω) Z_(s,n) (Ω)
115.91 54.276 25.963
102.23 72.65 14.39
102.23 72.65 16.126
115.91 54.276 14.39
25.963

Table 2: Comparison of three designs
Parameters Design 1
(Proposed design) Design 2
(Conventional implementation) Design 3
(Innovative design)
Frequency of operation 2.4 GHz/ 5.2GHz 2.4GHz...

Find Another Essay On A Planar Dual-Band Filter based on the Reduced Length Parallel Coupled Lines

The Impact of Shift Length on Nurse’s Health and Wellbeing

822 words - 3 pages 1.2.1.3. The impact of shift length on nurse’s health and wellbeing A number of studies have found that the working hours have considerable impacts on nurse’s health and wellbeing. The overall wellbeing of nurses who have a compressed schedule, such as working for 12-hour per day for 7 days and then 7 days off, were higher than nurses worked for standard schedule, such as standard 8-hour shifts, or standard 12-hour shifts with 2-3 days off

AIDS; AND THE BAND PLAYED ON

644 words - 3 pages "And the Band played on" AIDS. A virus in which is known to kill many, is portrayed as the key topic of the movie, "And the band played on." The AIDS virus remained unknown to the general public until the late 1980s, although the war against AIDS began years earlier. Unfortunately, many ignored this deadly virus for years. Some considered this disease to solely fall within homosexual communities, and failed to realize its potential."And the band

Investigating how the resistance of a wire Changes with length

1088 words - 4 pages electrons to pass through it at a higher rate. The longer wire though, the electrons are still travelling through the circuit not allowing them to rapidly conduct.ApparatusFor this experiment I used...*Ammeter*Voltmeter*Wires (with crocodile clips.)*Battery Pack*Meter stick*Nichrome WireThis diagram of the experiment.VariablesThis particular experiment consists of changing the length of the wire to see the change and affect it has on the resistance. I

The Impact of Dual Income Families on the Economy

2049 words - 8 pages polling agency based in New York, released an survey last September showing parents preferring, by 70 percent to 6 percent, one parent at home to a "quality" daycare center as the best arrangement for children under five years of age; 71 percent agreed with the statement that "parents should only rely on a daycare center when they have no other option" (Necessary Compromises, 2000). Additionally, a nationwide survey published by Parents magazine

The Dividing Lines of a City

2082 words - 9 pages as is necessary by the inner workings of the city itself, the structure would ultimately crumble from the inside out, until it is finally replaced or destroyed altogether. Yet, despite the importance of their dependence on one another to thrive, every group is completely divided from the next, as if entirely separate worlds altogether, with only a shared location being the common ground between them. Barriers are therefore inevitable, resulting in

A speech based on education

1976 words - 8 pages I would have liked to have had an education but instead I have to work on the streets if I don't I wont have anything to eat and I wont have any place to sleep tonight. These words were spoken to me by a 10 year old Colombian boy. He was very thin and looked as though he were only 6 years old.Unlike this boy, I was born a citizen of the United States. My parents came here in the late 1970's from Colombia, the country of their birth. I grew up an

To investigate how the length of a simple pendulum affects the time for a complete swing

1919 words - 8 pages DataVarying lengthThe length was changed by a factor of two. The time increased as the length increased but by a factor of 1.4 approximately.length(cm) mass(g) displacement(cm) time (20 swings)(s)30 25 10 22.3758 25 10 30.75From the trial data it is easily seen that the length of the pendulum is the only variable that has a significant effect on the time of swing.Resultslength(cm) √length(√cm) numberof swingsN timefor N swings(s) average timeN

Discussion on the Social Psychological Influences on Academic Achievement, Based on a Classroom Learning Experience

2229 words - 9 pages of Year is trying to get Kevin to focus on his future, so he does not miss out on any opportunities open to him, but he is focusing on the short term rewards of earning money immediately, rather than the long term potential which would result in him having a better quality of life with fewer opportunities for his petty crime to escalate. There are many theories that could be used to describe the situation that Kevin is in, some of them are; Self

Is there a democratic deficit in the EU and if so, how might it be reduced?

1525 words - 7 pages Is there a democratic deficit in the EU and if so, how might it be reduced? One of the most controversial debates in the history of European Union (EU) is if there is a democratic deficit in the EU. On the one hand, many scholars argued that the democratic deficit exists in the EU. On the other hand, there are other scholars who claimed that there is not a democratic deficit in the EU. In this essay, the writer will support the argument that

Comparing the Length of Words in a Broadsheet Newspaper and Tabloid Newspaper

1272 words - 5 pages information from both the tabloid and the broadsheet newspapers I will process my data into various different things. First I will put the results in the tally charts into a dual bar chart. Dual bar charts are a mathematical way of comparing data and in this case the data I will be comparing is the length of words in a broadsheet newspaper to the length of words in a tabloid newspaper. After the dual bar chart I will work

An Investigation That Determines How Mass, Amplitude and Length Affect the Period of a Simple Pendulum

1189 words - 5 pages Synopsis:This investigation will show how the mass, amplitude and length affect the period of a swing. The process that is needed is included and various hypotheses will be put forward. Whereby the mass will vary between 0.065 kg to 0.1535 kg, the amplitude will vary between 10 and 20 cm, and the length of string will vary between 0.1 and 2.57 m. It will also look at possible flaws and errors.Introduction:In order to determine how the mass

Similar Essays

A Concert Report On Rob And Amy The University Band

678 words - 3 pages beer. Rob is responsible for running the "Campus Idol Karaoke" every Wednesday nights after "Comedy Night" at Isaac's and got his band the gig of playing on Tuesday nights by befriending the manager. Almost everyone at the bar knows Rob and Amy and in between sets, the switch off and do their own songs for a while and one of them takes a break and roams the room. Rob can be seen chatting it up with almost anyone in the room, regardless of how well

And The Band Played On Essay

817 words - 3 pages And the Band Played On The movie, And the Band Played On, discusses the origin of the AIDS virus and how it spontaneously spread across the world. It used the Ebola disease to foreshadow the forth coming of another serious disease. The world was not prepared to handle such a contagious plague. Doctors around the world assumed that the first cases of the HIV virus to be just an abnormality of a certain disease, their carelessness of this

The Parallel Between “Cathedral” And “A&P”

2251 words - 9 pages itself. The stories differ in atmosphere and the quantity of people involve in each story which might be important to understand how changes occur. The audience can understand after analyzing these two stories that change is always possible and based on your action, a lesson is always to be learned the easy or the hard way. The story “Cathedral” took place in a family house with only the husband, wife, and finally the blind man, the wife in the

Has The Media And School Based Sex Education Reduced The Prevalence Of Sexually Transmitted Diseases?

790 words - 3 pages sexually transmitted infections (STIs) is increasing in the teenage group. Sexually active young people are vulnerable to STIs and prevalence among the young is increasing: 20-30% of females diagnosed with an STI have another within 18 months (8) Data from UK studies by Schofield (1965) and Farrell (1978) on numbers of 16 to 19 year olds reporting having intercourse before the age of 16 together with data from a more recent and very large study