46 research outputs found
High Gain Superstrate Loaded Membrane Antenna Based on Substrate Integrated Waveguide Technology
The design and the results of a single slot coupled substrate integrated waveguide (SIW) fed membrane antenna loaded with a superstrate layer are presented for 94âGHz communication system. The membrane antenna is designed using ANSYS HFSS and consists of 6 layers. The microstrip patch antenna (MPA) placed on the top pyralux substrate layer is excited by means of a longitudinal rectangular slot placed over the SIW structure in the bottom pyralux substrate. The simulated antenna impedance bandwidth is found to be 5âGHz (91.5â96.5âGHz) with a gain of 7âdBi. In order to improve the gain a superstrate layer is added above the membrane antenna. The maximum gain achieved is 14.4âdBi with an efficiency of 77.6% at 94âGHz. The results are verified using CST Microwave Studio and are found to be in good agreement
Superstrate Antennas for Wide Bandwidth and High Efficiency for 60 GHz Indoor Communications
International audienc
Millimeter Wave Antenna with Mounted Horn Integrated on FR4 for 60âGHz Gbps Communication Systems
A compact high gain and wideband millimeter wave (MMW) antenna for 60âGHz communication systems is presented. The proposed antenna consists of a multilayer structure with an aperture coupled microstrip patch and a surface mounted horn integrated on FR4 substrate. The proposed antenna contributes impedance bandwidth of 8.3% (57.4â62.4âGHz). The overall antenna gain and directivity are about 11.65âdBi and 12.51âdBi, which make it suitable for MMW applications and short-range communications. The proposed antenna occupies an area of 7.14âmm Ă 7.14âmm Ă 4âmm. The estimated efficiency is 82%. The proposed antenna finds application in V-band communication systems
High Gain and High Efficient Stacked Antenna Array with Integrated Horn for 60âGHz Communication Systems
In order to achieve wide bandwidth and high gain, we propose a stacked antenna structure having a microstrip aperture coupled feeding technique with a mounted Horn integrated on it. With optimized parameters, the single antenna element at a center frequency of 60âGHz, exhibits a wide impedance bandwidth of about 10.58% (58.9â65.25âGHz) with a gain and efficiency of 11.78âdB and 88%, respectively. For improving the gain, we designed a 2 Ă 2 and 4 Ă 4 arrays with a corporate feed network. The side lobe levels were minimized and the back radiations were reduced by making use of a reflector at λ/4 distance from the corporate feed network. The 2Ă2 array structure resulted in improved gain of 15.3âdB with efficiency of 83%, while the 4Ă4 array structure provided further gain improvement of 18.07âdB with 68.3% efficiency. The proposed design is modelled in CST Microwave Studio. The results are verified using HFSS, which are found to be in good agreement
Dielectric Resonator Nantennas for Optical Communication
Dielectric resonator antennas (DRA) are ceramic based materials that are nonmetallic in nature. They offer high permitivity values (Δr: 10-100). DRAs? have made their mark in various applications specially in the microwave and millimeter wave (MMW) spectrum, and are making encouraging progress in the THz band, because of their low conduction losses and higher radiation efficiencies compared to their metallic counterparts. With the advancements in nano fabrication, metallic antennas designed in the THz band have taken an interest. These antennas are termed as optical antennas or nantennas. Optical antennas work by receiving the incident electromagnetic wave or light and focusing it on a certain point or hot spot. Since most of the antennas are metallic based with Noble metals as radiators, the conducting losses are huge. One solution that we offer in this work is to integrate the nantennas with DRs. Two different DR based designs, one triangular and other hexagonal, are presented. Both the antennas operate in the optical C-band window (1550 nm). We design, perform numerical analysis, simulate, and optimize the proposed DR nantennas. We also consider array synthesis of the proposed nantennas in evaluating how much directive the nantennas are for use in nano network applications
A DR Loaded Substrate Integrated Waveguide Antenna for 60âGHz High Speed Wireless Communication Systems
The concept of substrate integrated waveguide (SIW) technology along with dielectric resonators (DR) is used to design antenna/array for 60âGHz communication systems. SIW is created in the substrate of RT/duroid 5880 having relative permittivity Δr=2.23 and loss tangent tanâĄÎŽ=0.003. H-shaped longitudinal slot is engraved at the top metal layer of the substrate. Two pieces of the DR are placed on the slot without any air gap. The antenna structures are modeled using CST Microwave Studio and then the results are verified using another simulation software HFSS. Simulation results of the two designs are presented; first a single antenna element and then to enhance the gain of the system a broadside array of 1Ă4 is presented in the second design. For the single antenna element, the impedance bandwidth is 10.33% having a gain up to 5.5âdBi. Whereas in an array of 1Ă4 elements, the impedance bandwidth is found to be 10.70% with a gain up to 11.20âdBi. For the single antenna element and 1Ă4 antenna array, the simulated radiation efficiency is found to be 81% and 78%, respectively
Conception and Realization of Flat FPC Antenna with different Polarization at Submillimeter Wave Frequencies for 6G Applications: Invited Paper
International audienc
BCB-Si Based Wide Band Millimeter Wave Antenna Fed by Substrate Integrated Waveguide
A benzocyclobutene (BCB) silicon (Si) based wideband antenna for millimeter wave applications is presented. The antenna consists of multilayer with one layer of BCB and the remaining three layers of Si. A patch is etched on the Si substrate above the air gap, which is excited through a slot. This architecture of slot, air gap, and patch will produce wide bandwidth by merging each one of resonances. The simulated results show that the antenna provides an 11 < â10 dB bandwidth of 9.7 GHz (17%) starting from 51.5 GHz to 61.2 GHz around 57 GHz central frequency. The antenna provides a maximum gain of 8.9 dBi with an efficiency of 70%
High-Efficient Slot-Coupled Superstrate Antenna for 60GHz WLAN Applications
International audienc
BCB-Si Based Wide Band Millimeter Wave Antenna Fed by Substrate Integrated Waveguide
A benzocyclobutene (BCB) silicon (Si) based wideband antenna for millimeter wave applications is presented. The antenna consists of multilayer with one layer of BCB and the remaining three layers of Si. A patch is etched on the Si substrate above the air gap, which is excited through a slot. This architecture of slot, air gap, and patch will produce wide bandwidth by merging each one of resonances. The simulated results show that the antenna provides an S11<-10âdB bandwidth of 9.7âGHz (17%) starting from 51.5âGHz to 61.2âGHz around 57âGHz central frequency. The antenna provides a maximum gain of 8.9âdBi with an efficiency of 70%