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In this paper studies an X-band ultra-wideband micro-balun based on LTCC, the working frequency of 7–13GHz, belonging to the X-band, the relative bandwidth is 60%. In this paper, from the design and manufacture of the product, combined with the theoretical basis, through the HFSS simulation software to complete the design, finally, it decided to use three coupling lines to improved Marchand Balun...
In this paper a practical application of an electrooptical communication system based on external modulation is reported. The sixteen ATSC TV-channels located at 2.4 GHz, were transmitted over a 30 km of standard optical fiber. The transmitted TV-signal uses Single-Side Band Full Carrier (SSBFC) modulation, allowing in this way an adequate management of the transmitted power and the bandwidth. The...
Now a day's increasing demand for higher bandwidth and other benefits of millimeter waves like line of sight communication and non bending property, molecular absorption, higher antenna gain at high frequencies make millimeter wave component design a favorite area of working. This transition structure of waveguide to microstrip line is useful for integration of high frequency circuits to the waveguide...
This paper presents a study of a printed X-shaped monopole antenna. The analysis has started from considering a strip fed conventional single band Rectangular Microstrip Antenna (RMSA) resonating at 2.45 GHz commonly used in WLAN applications. The antenna has been transformed to a monopole structure that has yielded a larger bandwidth. In the second part, triangular slots were introduced to the RMSA...
A simple yet efficient substrate integrated waveguide (SIW) crossover circuit is presented. It is formed by excitation of two orthogonal full-wavelength (TE102-mode) resonators whose centers coincide with that of the symmetric SIW cross junction. Half-wavelength (TE101-mode) resonators are added in all four ports to increase bandwidth. The SIW crossover is designed to operate at 24.75 GHz with a bandwidth...
In this paper antenna on silicon is presented. This paper proposes design of micro strip antenna on silicon with improved bandwidth. Proposed antenna is for X-band frequency. To improve bandwidth, ground defect being created on silicon substrate. With this we are improve bandwidth by 4–8 times. Designed verified both in HFSS simulation tool and on VNA after fabricating device.
The utilization of Electromagnetic band gap in microstrip antenna design becoming most popular. This periodic structure interacts with electromagnetic waves. It characterized by frequency stop-band, pass bands and band gap. Its application seen in filter designs, gratings, frequency selective surfaces, photonic crystal band gap, etc. The EGB structure reduces surface wave level, back lobes and improve...
This paper presents the design of a novel microstrip divider/combiner using T-type networks. Multiple step dividers were analyzed and designed, starting from the S-parameters representing the N-ports, their electrical specifications, and ending with full-wave simulations. We present here, two different designs with this technology, for 4 and 8 output ports. To validate the design, two prototypes working...
This paper presents design of an efficient microstrip antenna array for 5G communication systems. The antenna operates at 28 GHz and it is formed of 16 elements of rectangular patches arranged in a linear configuration. The single element has gap-coupled feeder and the antenna is designed on low-loss Teflon based RT/duroid 5880 substrate with dielectric constant of 2.2 and substrate thickness of 0...
A broadband rat-race coupler is proposed with planar configuration. Stepped-impedance and coupled transmission lines are utilized. Due to the symmetric structure, it is easy to design such a component by the even-/odd-mode analysis. A prototype is optimized to demonstrate our idea. The central frequency is 1.37 GHz with a 52% relative bandwidth. The return loss and port isolation are both better than...
The implementation of devices developed in microstrip technology is commonly found in radio frequency and microwave communications, where it has evolved with a variety of applications, among which fast response filters stand out. In this study, we present the design and behavior of a microstrip Hairpin bandpass filter for a frequency of 2.45 GHz, with a bandwidth greater than 100 MHz, and an insertion...
This paper presents the design of coupled-line directional couplers using microstrip technology. It is verified that by attaching sections to a coupled-line directional coupler, the working bandwidth of the device can be increased, this increase is also achieved by varying the length (L), width (W) and separation (Se) of microstrip lines within the coupler sections. For such purpose, couplers of 1,...
A wideband microstrip endfire antenna is designed for applications in base station and satellite communication. Utilizing substrate integrated waveguide technology, vertically polarized wave is generated by the driven element of the antenna. And a parasitic microstrip patch with one edge opened and the other three edges shorted is introduced as the magnetic dipole to improve the impedance matching...
A low-profile series-fed microstrip antenna and its 8× conformai array are presented. In this paper, the performances of the conformal array are excellent. Its obtained bandwidth is ranging from 0.94f0 to 1.06f0 with the active voltage standing wave ratio (AVSWR) less than 2.3, where the f0 is center frequency of the target band. Moreover, this proposed microstrip array can realize frequency scanning...
This paper proposes a Ka-band aperture-coupled microstrip patch antenna (ACMPA) based on low temperature co-fired ceramic (LTCC) technology for circular polarization (CP) at 29 GHz. The antenna consists of an aperture coupled patch with stacked parasitic strips (SPS). The CP is produced by cutting the patch and the parasitic strips. The antenna provides an impedance bandwidth of 1.2 GHz from 28 GHz...
This paper proposes a novel dual-band dual-sense circularly polarized (CP) annular ring slot antenna. The antenna consists of two concentric annular ring slots to achieve dual-band operation. The dual-sense circular polarization can be obtained by loading proper lumped capacitors across the inner and outer slots at +45° and −45°, respectively, with respect to the microstrip feed line. An antenna prototype...
A compact, low-cost, dual-band circularly polarized (CP) microstrip antenna with single-feed operating at both 1555 MHz and 2500 MHz bands is designed in this paper. The circular patch of the antenna is slotted with four complementary spiral grooves for dual-band radiation. The bandwidths of |S11|<−10dB of the antenna are 42 MHz centered at 1555 MHz and 25 MHz centered at 2500 MHz, respectively...
This paper proposes a new design of compact fractal patch microstrip antenna fed by coplanar waveguide to reduce the antenna dimension and to increase its bandwidth for Long Term Evolution application purposes. The results shown return loss of −23.45 dB and VSWR 1.144 can be achieved by controlling the height and the width of the fractal patch dimension. Bandwidth of the proposed antenna is 375 MHz...
The equivalent circuit of square-loop-resonator (SLR) bandpass filter (BPF) with cross-shaped I/O coupling is investigated to be analyzed and compared with the 3D electromagnetics (EM) simulator result. The proposed SLR BPF is designed for X-band frequency application with the center frequency of 9GHz and the −3dB fractional bandwidth larger than 3%. The analysis method is carried out by separating...
We present a new circularly polarized microstrip antenna with an airgap for multiple Global Navigation Satellite System (multi-GNSS) receivers. The airgap structure substantially increases antenna gain and bandwidth. We examined the antenna properties by simulation and measurement. The measured results show the −10 dB bandwidth of 4.9% and the maximum antenna gain above 7.0 dBi over the whole multi-GNSS...
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