A cpwfed quasipifa antenna using quasilumped resonators. Interdigital capacitors idcs are one of the most used transducers in chemical and biological sensors where a change in capacitance or impedance is measured as a response to the interaction between the analyte and a sensitive layer. In this paper a wideband microstrip patch antenna mpa using aperture coupling. Pdf analysis and design of microstrip antenna array. Interdigital capacitors are used also for the evaluation of nearsurface electrical properties, such as conductivity, permeability, and. Control and manipulation of electromagnetic waves is at the heart of many industries from wireless communication, internet and optical data storage to imaging and displays. Crlhtl unit cell on the ground plane must be understood. Design and fabrication of interdigital nanocapacitors. Bandwidth estimation of microstrip interdigital band pass. Figure 1 from hybrid mode wideband patch antenna loaded. The capacitance cp is the parasitic element associated with the shunt capacitance of the rectangular and interdigital sections. In this paper, two elements microstrip antenna array using interdigital capacitor a. The most common type of microstrip antenna is the patch antenna. Micap models a microstrip interdigital capacitor that has an emphasized transverse metallic strip connecting fingers at both input ports.
Figure 1 shows a type of interdigital bandpass filter commonly used for microstrip design. A compact wideband patch antenna loaded by interdigital. A microstrip interdigital capacitor is used in the third test circuit to replace the dc block, however, which does not show its advantage during the test frequency band. Microstrip patch antenna miniaturization using planar. L wi for i 1, 2 are the inductances per unit length of the appropriate micriostrips, having widths w 1 and w 2, respectively. A new wide stopband microstrip bandpass filter with. Following is the list of useful converters and calculators. Download scientific diagram microstrip interdigital capacitor design structure. Pdf new cad model of the microstrip interdigital capacitor. How do i calculate the capacitance of an interdigital. Inter digital capacitors find application in filter, hybrid couplers, dc blocking circuits, tuning impedance matching network. Lancaster, member, ieee i abstracta new type of miniaturized microstrip bandpass fil ters with pseudointerdigital structure without via hole grounded. Description the capacitance calculated using this tool is the capacitance between a flat conductor and the ground plane over the conductor length. A microstrip patch antenna using planar metamaterial unit cell is designed, simulated and analyzed.
The interdigital capacitors are employed to control the center frequency easily. An interdigital capacitorbased srr structure coupled with a microstrip transmission line was used as a microstrip resonant sensor at 2. The structure is similar to that of an interdigital capacitor. A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate, such as a printed circuit board, with a continuous metal layer bonded to the opposite side. Interdigital capacitors are used to substitute for the traditional gaps between hairpin resonators, thereby facilitating stronger coupling. A high directivity wideband resonant cavity antenna rca is proposed in which a compact wideband microstrip patch antenna mpa is utilized as radiator. Planar patch antenna using an interdigital capacitor download.
Microwave gas sensing with a microstrip interdigital. This antenna consists of three sectional patches, two interdigital lines capacitors with a defected ground, and two shorting pins. An efficient terahertz antenna using cpw interdigital capacitor. These include wire antenna, microstrip patch antenna, reflector. As the frequency increases, the capacitor becomes more capacitive, due to. Interdigital capacitor based compact microstrip bandpass filter. Dielectric capacitors with threedimensional nanoscale. The corresponding lossless lc equivalent circuit is presented in fig. Analysis and design of microstrip antenna array using interdigital capacitor with crlhtl ground plane for multiband applications. Hfss model resonates way to low see y parameters and c is about 100 time to high. Microstrip capacitance model capacitance between the upper conductor and ground plane is. This is a prime candidate for the 5g mobile network system.
The idc which represents a left hand series capacitor is inserted in the center of upper semi part of the patch. A novel compact microstrip balun bandpass filter design. To achieve a compact size, the stepped impedance transmission lines are. Interdigital capacitor based compact microstrip bandpass filter with wide. In this paper, performance of a conductor backed coplanar waveguide cpw interdigital capacitor based microstrip patch antenna at the terahertz.
In this paper, compact microwave components, including a wilkinson power divider and a 3 db branchline coupler based on artificial transmission lines atls with harmonic suppression, are presented. So, the microstrip line was compared to an antenna, and it wasnt until about 15 years later, when the microstrip patch antenna was proposed, which was based on precisely the same concept. Hybrid mode wideband patch antenna loaded with a planar metamaterial unit cell. The methodology uses interdigital capacitor provided on one arm of ushaped patch antenna. The microwave design retained for the study is a microstrip interdigital capacitor idc on which the titania layer is deposited. Very small coupling capacitors are required for bandpass filters in the frequency range between 100mhz and 1ghz, often with values under 0. Compact microwave components with harmonic suppression. A size reduced crlh resonant antenna based on interdigital.
Microstrip interdigital capacitor design structure. This will be demonstrated in the following practical development. A compact, lowcost microstrip bandpass filter bpf with low insertion loss and wide attenuation. The airbox is big because i made it lambda4 for the lowest frequency. This proposed filter with microstrip interdigital geometry not only exhibits good. Microstrip patch sensor antenna for relative permittivity. The interdigital capacitor and meander line shortcircuited based zor antenna in 9 achieved a bandwidth of 15. I made a model in sonnet also, so the compare results. Microstrip patch antenna arrays are used in a number of industries as transceivers of radar and rf signals.
In order to analyse the efficient results provided. A novel compact microstrip balun bandpass filter design using interdigital capacitor loaded open loop resonators ali k. Mzr resonators etched in microstrip patch with enhanced. A miniaturized interdigital capacitor resonator icr is proposed in the design of a new wide stopband microstrip bandpass filter. Input problems the component in the model library is under circuit elementsmicrostrip capacitormsicapse. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in uwb range i. For the best performance of the proposed antenna, the effect of. Slotloaded microstrip patch sensor antenna for high. A section atl is consisted of microstrip stepped impedance transmission lines and a microstrip interdigital capacitor. Micap is geared toward interdigital capacitor that connects to microstrip lines having widths that are small comparing to capacitor width less than 50% of capacitor width. A compressed planar bandpass filter using microstrip square resonators with interdigital capacitor mehdi nosrati, zahra atlasbaf department of electrical engineering of tarbiat modares university, p. The filter configuration, as shown, consists of an array of temn mode or quasitemmode transmission line resonators, each of.
The model accounts for losses in metal and in substrate dielectric. The conventional antenna has designed for same dimensions as metamaterial loaded ushaped patch antenna. Antennas using patches as constitutive elements in an array are also possible. Double click on the circuit symbol to access the list of the dimensions. Micap takes advantage of the em quasistatic coupled lines approach to considering interaction between all fingers. Because all microstrip antennas have to be matched to the standard generator impedance or load, the input impedance matching method for antenna is.
The dimensions of the capacitor in the first effort are as follow. As you can see in the attachment, i made the model of idc on a 200nm ferroelectric material. The proposed mpsa was designed by etching the mls along the radiating edge of the patch antenna, and it enhanced the relative permittivity sensitivity with an additional effect of miniaturization in the patch size by increasing the slot length. This example is an interdigitated capacitor composed of seven closely coupled parallel lines. An adapted methodology will be proposed in the following, in order to provide a common baseline which could facilitate future comparative studies of microwavebased sensors. Interdigital capacitor with composite right left handed transmission line. Analysis and design of microstrip antenna array using. Such an icr has a curved geometry with small dimension, but with a large equivalent selfcapacitance and higher the first spurious frequency. The proposed interdigital capacitor should be designed for xband applications 10 to 12 ghz. This model consists of calculating the 2n 2nymatrix of the n coupled lines using the multiple coupled line tool. The effect of variations of capacitor parameters on antenna characteristics are shown in fig. Meanderline slotloaded highsensitivity microstrip patch. The antenna is composed of an inductor covered by a set of interdigital and parasitic capacitors. Micap3 microstrip interdigital capacitor 1 port symbol illustration parameters.
A highsensitivity microstrip patch sensor antenna mpsa loaded with a meanderline slot mls is proposed for the measurement of relative permittivity. Analysis and design of microstrip antenna array using interdigital. A compact wideband patch antenna loaded by interdigital capacitor with equivalent. Equivalent circuit modelling of microstrip patch antenna. Novel method for planar microstrip antenna matching impedance. A csrr structure based on an interdigitalcapacitorshaped defected ground structure. In this structure, the width of the microstrip hairpin is 1 mm. Micap2 microstrip interdigital capacitor 4port symbol illustration parameters. A patch with an interdigital capacitor is on the top side, and a csrr slot is etched on the bottom side as a ground plane. Design of high gain, wideband microstrip resonant cavity. A new model for the microstrip line interdigital capacitor is proposed. Comparative design and analysis of both conventional and.
Through introducing an interdigital capacitor idc in the patch, a planar metamaterial mtm unit cell in the ground plane and cutting two vertical slits from the slot, size reduction of the. A novel compact microstrip interdigital bandstop filter is designed and implemented. The slotcoupled microstrip patch antenna array synthesizer simulates a single slotcoupled microstrip patch antenna, fabricated on a multilayered lowtemperature cofired ceramic. Implementing these interdigital ca pacitors in microstrip gives some ad vantages. Interdigital capacitor calculator converters and calculators. The metamaterial unit cell is consisting of an interdigital capacitor and a. Following equation or formula is used for interdigital capacitor calculator. The interdigital capacitor is a quasilumped element for producing capacitorlike, high pass characteristic using microstrip lines that are used as dcblocking capacitor in many microwave circuits. This study is carried out to evaluate the efficiency of using a microstrip interdigital capacitor to guarantee both feeding and matching impedance.
1336 874 1032 1153 114 893 704 989 331 887 680 1263 4 307 504 179 761 872 669 1291 1510 1211 210 1032 944 322 1108 699 336 1502 1169 1134 1518 989 871 825 1337 893 424 862 1463 382 1404 1097 1215 217 922 222 509