Broadband twin tail fins antenna on HR SOI silicon substrate for 60GHz applications

International audienceThis paper presents a broadband antenna on HR SOI CMOS technology for co-integration with power amplifier (PA) or low noise amplifier (LNA). In a system on Chip (SoC) approach, the co-design of the antenna and Integrated Circuits (ICs) on a same silicon substrate is a convenient solution to suppress lossy matching networks and to reduce the radio front-end cost. The proposed antenna presents a simulated gain greater than 5 dBi and a simulated |S11|dB below -10 dB over a 30 GHz frequency band [53-80 GHz]. This concept has been validated on Alumina substrate with a good agreement between measurement and simulation

Investigation of the effect of metallic frames on 4G eyewear antennas

In this paper, we investigate the effect of metallic eyewear frames on the reflection coefficient, the radiation pattern and the specific absorption rate (SAR) of 4G antennas integrated in eyewear. The antennas used in the study are Coupling Element type, with appropriate matching networks to cover simultaneously the 700-960MHz and 1.7-2.7GHz frequency bands. Two different antenna locations are evaluated: behind the user's ear and at the opposite corner of the printed circuit board, close to the eye. For both antennas, the effect of metallic frames is investigated through numerous simulations. Compared to the case without metallic frame, the matching and radiation patterns are slightly affected. Although there is a redistribution of the SAR hotspots inside the head, the change in the 1g and 10g SAR values are marginal as a result of including the metallic frame

Dual-band 4G eyewear antenna and SAR implications

This paper presents low-cost and easy-to-manufacture dual-band antenna solution to achieve cellular 4G (LTE-Advanced) coverage in smart eyewear devices. Coupling element type antenna has been evaluated with appropriate matching networks to cover the target bands of 700-960MHz and 1.7-2.7GHz. To emulate a realistic device, an ABS plastic dielectric frame has been designed and manufactured using 3D printing technology. Simulations for the antenna are carried out in three typical use-case scenarios which are "with user's head", "with head and hand" and "free space". The simulations are validated through S-parameters, efficiency and radiation pattern measurements using fabricated frame and antenna prototype in the presence of head and hand phantoms. The SAR behavior of the antenna designs is also investigated through simulations and measurements. It is demonstrated that SAR values are found to be above the limitations which might be problematic in practical use if the transmit power of the eyewear is not reduced

MIMO antenna concept for 4G electronic eyewear devices

MIMO antenna concepts for electronic eyewear devices operating in 4G cellular standard are proposed in this paper. Coupling element type antennas and matching circuits are used to obtain a high bandwidth potential for the coverage of the 700-960MHz and 1.7-2.7GHz frequency bands. To obtain a dual-antenna MIMO configuration, two CE type antennas are placed on the two sides of the head, resulting in a very high isolation level thanks to the lossy nature of the human tissues (head). It is shown through simulated 3D radiation patterns that very low envelope correlation coefficients are obtained for this placement. Preliminary SAR simulations show values above the 1g standards

Contribution to the modelling, the design and the characterization of integrated antennas on silicon for mmwaves applications

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Multiple-slot antennas on high resistivity silicon substrate for impedance control in a co-design with amplifier scheme

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Dedicated measurement setup for MMW silicon integrated antennas : BiCMOS and CMOS high resistivity SOI processes characterization

International audienceThanks to the competitive performances of CMOS and BiCMOS transistors, we are able to integrate the complete RF front-end on a same silicon substrate, including the antenna. In this paper, we describe a state-of-the-art measurement setup dedicated to the full characterization of silicon integrated antennas. This anechoic chamber is able to address radiation pattern and gain extraction as well as return loss measurements as far as the appropriate calibration technique is applied. First, a standard 22.5 dBi-gain horn antenna is measured to validate the extraction method. Then, a 40 GHz dipole antenna on a low resistivity substrate and a 60 GHz folded-slot antenna on a high resistivity SOI substrate are characterized. Gain values of -11.9 dBi and -0.4 dBi are extracted, respectively. For these antennas we are also able to plot their radiation pattern in their E and H planes

Folded slot integrated antenna array for millimeter wave CMOS applications on standard HR SOI Silicon substrate

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94 GHz silicon co-integrated LNA and Antenna in a mm-wave dedicated BiCMOS technology

International audienceA co-integrated Low Noise Amplifier (LNA) with a dipole antenna is designed considering a millimeter-wave dedicated BiCMOS technology. The targeted application is a 94 GHz passive imaging for security applications. The LNA is based on a high-speed SiGe:C 130 nm HBT. The interest of the co-integration on a common silicon substrate is demonstrated through the decrease of insertion losses between the antenna and the amplifier. The capability of the BiCMOS9MW technology is illustrated to achieve this co-integration reaching a total gain of 3.0 dB (Gantenna + GLNA) for a power consumption of 11 mW, in a single-stage LNA configuration. A two-stage configuration achieves a total gain of 8.5 dB with a power consumption of 21 mW

Folded slot integrated antenna array for millimeter wave CMOS applications on standard HR SOI Silicon substrate

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