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74 Threads found on edaboard.com: Resonator Coupled
you are all right. The oscillator runs at one frequency depending on what frequency the resonator is tuned to. But the resonator is also coupled to the outside world. So outside load impedances other than 50 ohms can change slightly the resonant frequency of the resonator. By adding a 6 dB attenuator, whatever the load (...)
Hi there I need a Matlab code for Parameter Extraction of Symmetric coupled resonator filters. I have the code to generate the S parameters and I don't know how to use it in Parameter Extraction Procedure. Can anybody help me ? Thanks
It's not so complicated.You will use a directional coupler to measure the reflected waves coming from the resonator and you will also use a VCO to sweep the frequency band which in you're interested.The system will sweep the VCO and will observe the reflected wave at proper port of directional coupled and using a bit signal processing methods with
There isn't second port.The VCO has two parts, active part and passive part.If you obtain sufficient negative resistance from active side, you design a resonator in according with this active portion the VCO starts to swing.. Your test setup is completely wrong, the transistors are not biased at all. Read something about VCO simulation techniques
Hello everyone. I am trying to simulate, for my undergraduate thesis, a new RF circulator that was published by Nature Physics on article called "Magnetic-free non-reciprocity and isolation based on parametrically modulated coupled-resonator loops". My doubt is how to create a setup that understands one RF signal (sweep from 140MHz to 200Mhz)
Consider that mechanical and electrical quantities are coupled by the piezo transducers. In so far the general answer is yes, the resonance frequency is affected by the connected electrical circuit. Similar a crystal's resonance frequency can be pulled by an external capacitor. How much depends on the parameters of the mechanical resonator, par
Hi! Everyone. I am a student from Taiwan. Please forgive me for my poor English. I have some question as title. I have already read some paper for DR these days. There are some questions bother me. Some paper says the equivalent circuit can be modelled by a transformer and a parallel RLC,but some says it can be modelled by a inve
Hello, How we can design the Narrowband Microwave bandpass filter using Cavity resonator Filter coupled with small irises ?? How we can decide the size and type of iris that can be suitable for our filter?? Is there any limitation for using the number of iris structure that can use for one filter ?? How we can decide that either i can use cir
Hi, I am simulating to find the resonance frequency and measured quality factor of some CPW transmission line resonator with a short circuit as termination. They are coupled to the feedline via a series coupling capacitor. I set the length from the coupling cap to the short-to-GND, then I applied a sheet and set the boundary as lumped RLC to m
Hello, I am going through "Microstrip Filters for RF Microwave Applications 2nd Edition" by Hong, and am not entirely satisfied by the explanation of coupled resonator circuits (chapter 7). When analyzing these circuits, they quickly dive into forming an impedance matrix, which makes sense. But the next step is to normalize the nxn impedance matrix
Recently i found parallel feedback DRO design where resonator is coupled to perpendicular microstrip lines. Usually parallel feedback DRO feedback lines are parallel. In this design lines are perpendicular: 115459 Both open lines after resonator coupling have effective lengths equal to quarterwave open stub. Then I t
Reference article was published in 1951. At this time no VNA or HFSS existed but signal generators and detectors. Tuning method is useful for preliminary tuning of filter and final tuning is done in iteration manner. Today such filter is tuned by using scalar or vector network analyzer which shows how particular filter resonator is tuned and off co
Hello! Let's place dielectric resonator between two "infinite" microstrip lines. On the one end of line we put RF would be current direction in second microstrip line? Assuming coupling between lines goes only through DR... original image from:
how to inductively couple a two turn spiral resonator inorder to convert monoband antenna to a dualband provided that i have chip and antenna impedance and size, position of two turn resonator is also given
DRO and sapphire resonator oscillators will not be able to tune 30 MHz. Some might tune 15 MHz, but at the cost of poorer phase noise I personally would get a waveguide cavity, load it with a GaAs high Q varactor diode that is lightly coupled to only tune it maybe 40 MHz, and use a high power device (like maybe 0.25 watt transistor...bipolar if
With 1 milliohm of esr in each inductor, the rms current in the primary inductor is just 1.93 Amps. With 30 milliohms of esr in each inductor, the rms current in the primary inductor is 6.12 Amps. I think it's the other way around. High current with low ESR. What happened? You design a high Q series resonator and tune it careful
For DRO it can be simply phase relation, where theta=ang(s11)/2. I need it for calculations.
I've seen circular ring resonators but not spherical. Are you sure that's what you want? How do you plan on fabricating the sphere or keeping it in place? 1. You should define integration lines to your ports from center of line straight down to ground. 2. interpolating sweep from .5-100GHz with solution frequency of 20GHz may miss any resonance
Helical EM coupled resonator Filters are generally used to implement this type of filters.They are very bulky filters but it's worthy to try..
Hi all, I'm just wondering if you can explain to me how to define the input/output for the coupled resonator design attached. I designed this resonator so it will have a peak resonant frequency at fp1=2484.2, fp2=2526.1. So the coupling coeff should be 0.03313. Please find the structure for the coupled (...)
In my view, the high filter Q and respective unpleasant ratio of component values demands for a "coupled resonator" topology. You'll still want to fine tune the filter stages to meet the intended characteristic.
hi, some professor how can i get the following formulas, the insertion loss of the single resonator:L(f)=-10log{(1+(2QL*(f-f0)/f0)^2)/(1-(QL/QU)^2)}; the insertion loss of the filter: L(f)=-10log{((1+QE/QU)^2/2kQE+kQE/2)^2+2((1+QE/QU)^2/k^2-QE^2)((f-f0)/f0)^2+4((QE/k)^2((f-f0)/f0)^4} thank you!
increase height of patch above ground plane. Doubling the height will double the useful bandwidth. Use of an additional resonator so you get a pass band that looks like an over-critically coupled 2 resonator band pass filter. By using two resonators (that is the antenna element itself and an additional (...)
Hello Experts, I want to design a Microstrip Ring resonator on Ansoft HFSS; using Roger duriod 5880 substrate for my project εr=2.2, tand=0.0009, Zo=50 Ω, h=787um, t=17.5um at 1GHz, What are the basic formulas for the MS Ring-resonator; I have found some literature on MS-line, but did't get for MS-Ring resonator, How
Combline filters, due to using loading capacitors on the resonator lines, the total line dimensions are smaller compared to other filters as, Interdigital, Parallel coupled, Hair Pin, etc. Regarding the question, where can be used, the answer is: mainly in UHF up to few GHz circuits.
I wonder if we can measure the reflection coefficient in the case of Dielectric resonator Cavity with the knowledge that cavity does'nt have any excitation port!. (as in attached image) if there is any method or other model, please tell me. regards. 67576
half wavelength printed microstrip resonator at 5.8 GHz. The resonator is coupled to a 50 Ohms microstrip line in a critical coupling.
Because....its not. The resonator is a little shorter than half wave.
One convenient way to design such a wide band filter would be cascading low pass and high pass filters with LC designs. coupled resonator is not practical for such a wide bandwidth.
can any one help me to find this paper: H. V. Nguyen and C. Caloz, "Broadband highly selective bandpass filter based on a tapered coupled-resonator (TCR) CRLH structure," Special issue Microwave Metamaterials: Theory, Fabrication and Applications, Proc. of the European Microwave Association, J. Eur. Microwave Association, vol. 2, pp. 44-51,
Dielectric resonator Oscillators I think cross-coupled structure doesn't allow for maximum variation near resonance in order to insure high circuit
Loaded Q means how strong is your resonator coupled to your circuit. High loaded Q means your resonator is weakly coupled to your circuit. Since the unloaded Q of your resonator must be higher than your unloaded Q, you may have to change the resonator with higher unloaded Q in order for your (...)
currently im doing a single-fed EM coupled ring resonator.. only focusing in Circular Polarization..i have the difficulty in determine whether my design in CP o LP... some said to determine whether is CP 1. find the axial ratio...but in my case..the value in at 7dB..thus my design in not CP?? 2. by just looking design fulfill the
Hi everyone.....! I need help on the lumped-element equivalent circuit model of an aperture-coupled cylindrical dielectric resonator antenna...... ta!
Can anyone tell me how to extract coupling matrix M from given S-parameter matrix of a filter, assuming given number of resonators (N) and known source and load values (R1, RN)? I cannot find formulas or numerical procedures.What you want to do is an identification of black box filter as resonator coupled BPF ?
Hello, BPF_Layout.jpg is a Microstrip stub-line Filter... Transversal_filter.jpg Microstrip coupled resonator Filter... ---manju---
Tapping to the first and last resonators is much a much better choice and also saves spaces. Why do you want to use the transform coupled lines? For the transform coupled lines, you can use the same length as your resonator. You need to control the space between your line and the first (last resonator) to (...)
I am new to HFSS and need to design and simulate an electrically coupled resonator to see the fields around the structure. I would like to know if anyone can help me on how to go about this using HFSS. The resonator is RG 401/U coaxial cable coupled at both ends to the VNA using RG-405/U cables. The dimensions are as (...)
Can someone please give me the formula for calculating the complex permittivity of an electrically (or capacitively) coupled coaxial probe (resonator)? Thank you
Does anyone know how to find the coupling coefficient (g) of a capacitively-coupled resonator (i.e. coupling to the electric fields of a coaxial resonator)? Secondly, can someone tell me how to find the capacitance of such electric coupling? Please help me urgently. Thank you.
Does anyone know how to find the coupling coefficient (g) of a capacitively-coupled resonator (i.e. coupling to the electric fields of a coaxial resonator)? Secondly, can someone tell me how to find the capacitance of such electric coupling? Please help me urgently. Thank you.
1) Narrow band compact non-degenerate dual-mode microstrip filter Sheta, A.F. National Radio Science Conference, 2008. NRSC 2008 Volume , Issue , 18-20 March 2008 Page(s):1 - 7 Digital Object Identifier 10.1109/NRSC.2008.4542317 2) Compact hexagonal open-loop resonator bandpass filters using capacitive side-coupled stub and spurline tech
hi. how can we calculate gap size and inner conductor for a resonant frequency in a coax cavity resonator like this in attachment file?and if we want to coupled 2 of this filter with aperture how could we measure coupling coeficient for aperture? plzz help me is very important. thx
Hi. I am working on design of printed microstrip parallel-coupled, half-wavelength resonator bandpass filter. I must simulate it by using CST 5 and need any help at simulating single stage of coupled lines... 1. How I define waveguide ports, cause i cant define them by usual way because of open ends.. 2. And more important - how i can see (...)
Yes, a parallel coupled line in TEM structure (Stripline, slabline) can be modelled that way. But you do realize that one of these quarterwave coupled line sections only forms 1/2 of a half wavelength resonator. In other words, EACH resonator contains two of these model structures.
hi i want to know whats the difference between a bandpass or a bandstop filter and a resonator? or they are different names of same thing? regards
Phys. Rev. E 64, 066602 (2001) Optical pulse propagation and holographic storage in a coupled-resonator optical waveguide
Hello I am new here and I hope to get help for my assignment: Question ? Design a Chebyshev three-resonator, capacitor top-coupled, constant-k bandpass filter centered at 1MHz, with 1 dB ripple and a 100kHz, 3 dB bandwidth. The source and load resistors are 1.5kΩ and available inductors have a quality factor of 60. We just
Hi I have a microstrip line side coupled to a microstip ring-resonator, that is the ring is placed beside a normal microstrip line. The measured and simulated values gives only an S21 of about -0.35dB at resonance? Compared to the value of about -0.25dB of the pure microstrip line at the same frequency. My microstrip and ring width is 206 u
hello all, can any1 provide me tutorial on simulation of microstrip line coupled with dielectric resonator in HFSS ? many regards...