Microprocessor provides multi-mode versatility for the ESSA antenna system

2010 ◽

Vol 29-32 ◽

pp. 884-889

Author(s):

Hua Wei Zhan ◽

Cai Xia Guo ◽

Yu Zhang ◽

Yun Zhou

Keyword(s):

Network Optimization ◽

Low Frequency ◽

Antenna System ◽

Substructure Method ◽

Feed Network ◽

Cascade Method ◽

Designing Method ◽

Multi Mode

Multimode feed network is an important part of shortwave multimode multifeed antenna system. The design of feed network is a pivotal technique in the process of projecting antenna system. The substructure analyzing method of interconnect-net is based on the substructure matrix database which is formed by converting the net parameters into data. And it characterizes the non-uniform net units through the database directly. Then cascades the known database of the net units by means of ordinary net cascade method, thus performing optimization in the net. In the paper, the Substructure Analyzing Method of Interconnect-net is applied to designing multi-mode multi-feed network, a typical example of multi-mode multi-feed network optimization is given to illustrate the efficiency of the method.

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Design of a Twelve-Port MIMO Antenna System for Multi-Mode 4G/5G Smartphone Applications Based on Characteristic Mode Analysis

IEEE Access ◽

10.1109/access.2020.2994068 ◽

2020 ◽

Vol 8 ◽

pp. 90751-90759

Author(s):

Jian Dong ◽

Shan Wang ◽

Jinjun Mo

Keyword(s):

Antenna System ◽

Mode Analysis ◽

Smartphone Applications ◽

Characteristic Mode ◽

Mimo Antenna ◽

Multi Mode

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Multi-mode ground reconfigurable MIMO antenna system

2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation (APCAP) ◽

10.1109/apcap.2015.7374307 ◽

2015 ◽

Author(s):

Rifaqat Hussain ◽

Mohammad S. Sharawi

Keyword(s):

Antenna System ◽

Mimo Antenna ◽

Multi Mode

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Research on multi-mode multiplexing OAM antenna system based on offset-fed beam bunching paraboloid

Electromagnetics ◽

10.1080/02726343.2021.1962607 ◽

2021 ◽

pp. 1-13

Author(s):

Xian-Zheng Zong ◽

Han-Fei Zhang ◽

Zheng-Tian Chen ◽

Hong-Yu Chu ◽

Chao-Guang Lin ◽

...

Keyword(s):

Antenna System ◽

Multi Mode

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Design of Multi-Mode Antenna Array for Use in Next-Generation Mobile Handsets

Sensors ◽

10.3390/s20092447 ◽

2020 ◽

Vol 20 (9) ◽

pp. 2447

Author(s):

Naser Ojaroudi Parchin ◽

Haleh Jahanbakhsh Basherlou ◽

Raed A. Abd-Alhameed

Keyword(s):

Antenna Array ◽

Ground Plane ◽

Multiple Input Multiple Output ◽

Antenna System ◽

Cellular Systems ◽

Good Efficiency ◽

Mimo Antenna ◽

Fifth Generation ◽

Input Multiple Output ◽

Multi Mode

In this study, a new design of a tri-band multiple-input–multiple-output (MIMO) antenna array is proposed for fifth-generation (5G) cellular systems. Its structure is composed of eight identical planar-inverted F antenna (PIFA) elements placed at different edge corners of the handset mainboard with overall dimensions of 150 × 75 mm2. The PIFA elements and ground plane of the MIMO antenna system are arranged on the back layer of the platform, which makes the design easy to integrate with the handset circuit. For S11 ≤ −10 dB, the radiation elements of the MIMO design operate at the frequency ranges of 2.5–2.7 GHz, 3.4–3.75 GHz, and 5.6–6 GHz covering the long-term evolution (LTE) 41, 42/43, and 47 operation bands, respectively. The array achieves better than 15 dB return loss results across the three operating bands. The presented antenna array not only exhibits multi-band operation but also generates the polarization diversity characteristic, which makes it suitable for multi-mode operation. The proposed antenna array was simulated and experimentally tested. Fundamental characteristics of the proposed design are investigated. It offers three band S-parameters with acceptable isolation and dual-polarized radiation with quite good efficiency and gain results. Besides this, the total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) results of the PIFAs are very low over the bands. In addition, the radiation characteristics of the MIMO antenna in the presence of the user and handset components are studied. Moreover, a new and compact phased array millimeter-wave (MM-Wave) antenna with broad bandwidth and end-fire radiation is introduced which can be easily integrated into the smartphone antenna system. Due to its good performance and simple structures, the proposed smartphone antenna array design is a good candidate for future multi-mode 5G cellular applications.

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Advanced Ceramics Sintering Using High-Power Millimeter-Wave Radiation

MRS Proceedings ◽

10.1557/proc-430-533 ◽

1996 ◽

Vol 430 ◽

Cited By ~ 3

Author(s):

Y. Setsuhara ◽

M. Kamai ◽

S. Kinoshita ◽

N. Abe ◽

S. Miyake ◽

...

Keyword(s):

Silicon Nitride ◽

Millimeter Wave ◽

High Power ◽

Antenna System ◽

Wave Radiation ◽

Optical Antenna ◽

60 Ghz ◽

Densification Temperature ◽

Multi Mode ◽

Focused Beam

AbstractThe results of ceramics sintering experiments using high-power millimeter-wave radiation are reported. Sintering of silicon nitride with 5%Al2O3 and 5%Y2O3 was performed in a multi-mode applicator using a 10-kW 28-GHz gyrotron in CW operation. It was found that the silicon nitride samples sintered with 28 GHz radiation at 1650'C for 30 min reached to as high as theoretical density (TD), while the conventionally sintered samples at 1700°C for 60 min resulted in the density as low as 90% TD. Focusing experiments of millimeter-wave radiation from the high-power pulsed 60-GHz gyrotron have been performed using a quasi-optical antenna system (two-dimensional ellipso-parabolic focusing antenna system) to demonstrate the feasibility of the power density of as high as 100 kW/cm2. Typical heating characteristics using the focused beam were made clear for this system. It was found that the densification of yttria-stabilized zirconia (ZrO2-8mol%Y2O3) samples to as high as 97% TD was obtained from the sintering with focused 60 GHz beam in pulse operation with a 10-ms pulse duration at a 0.5Hz repetition. The densification temperature for the zirconia could be lowered by 200°C than that expected conventionally.

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Multi-mode light microscopy of microtubule assembly dynamics and chromosome movement in vivo and In vitro

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100166117 ◽

1996 ◽

Vol 54 ◽

pp. 730-731

Author(s):

E. D. Salmon ◽

J. C. Waters ◽

C. Waterman-Storer

Keyword(s):

Imaging System ◽

Ccd Camera ◽

Transmitted Light ◽

Microtubule Assembly ◽

Live Cells ◽

Optical Efficiency ◽

Multiple Band ◽

Multi Mode

We have developed a multi-mode digital imaging system which acquires images with a cooled CCD camera (Figure 1). A multiple band pass dichromatic mirror and robotically controlled filter wheels provide wavelength selection for epi-fluorescence. Shutters select illumination either by epi-fluorescence or by transmitted light for phase contrast or DIC. Many of our experiments involve investigations of spindle assembly dynamics and chromosome movements in live cells or unfixed reconstituted preparations in vitro in which photodamage and phototoxicity are major concerns. As a consequence, a major factor in the design was optical efficiency: achieving the highest image quality with the least number of illumination photons. This principle applies to both epi-fluorescence and transmitted light imaging modes. In living cells and extracts, microtubules are visualized using X-rhodamine labeled tubulin. Photoactivation of C2CF-fluorescein labeled tubulin is used to locally mark microtubules in studies of microtubule dynamics and translocation. Chromosomes are labeled with DAPI or Hoechst DNA intercalating dyes.

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