radio wave antenna design

... polarization design 14 2.5 Finite-difference time-domain analysis…… 16 2.6 Summary……… 22 Chapter 3 Reduced size antenna design……… 23 Trang 53.1 Introduction 23 3.2 Antenna design 27 3.2.1 Theoretical design ... F antenna……….56 4.2.5 Dual band inverted F antenna with an air gap……… …………57 4.2.6 Inverted L antenna with parasitic stripline……….….58 4.3 Antenna design 59 Trang 64.3.1 Modified inverted L antenna ... basic antenna characteristics, such as the antenna impedance bandwidth, antenna gain and radiation pattern have been defined Basic antenna miniaturization and circularly polarized antenna design...

Ngày tải lên: 30/09/2015, 13:41

... reader antenna designs In Chapter 3, a top-to-bottom coupled segmented loop antenna is introduced The antenna configuration is presented The principle of the antenna operation is discussed Design ... thesis is to design near-field UHF RFID reader antennas The antennas designed are capable of providing wide coverage areas and long detection distances in the near-field zone of the antennas 1.3 ... proposed antenna After that, the proposed antenna is being prototyped The measurement of the antenna prototype is Trang 28conducted to verify the design After that, comparison between the proposed antennas...

Ngày tải lên: 16/10/2015, 15:37

... circuit  Always follow the antenna designer’s/manufacturer’s recommended ground pattern for the antenna Commonly used PCB antennas are variants of a monopole antenna Monopole antennas need solid ground ... of simply adjusting the length. Antenna Design and RF Layout GuidelinesInverted-F Antenna (IFA)The Inverted F Antenna (IFA) outperforms the Monopole Inverted F Antenna (MIFA) in terms of radiation ... for IFA Antenna Design and RF Layout Guidelines For compact PCB designs, chip antennas are an effective solution, offering minimal size and reasonable performance These off-the-shelf antennas...

Ngày tải lên: 23/09/2022, 10:20

... purposes The design parameters for each of the antenna types, was established, and the three theoretical antenna designs computed After the antenna computations were complete, a written design procedure ... the patch antenna An example of this method of design is illustrated in Figure 3, shown below Figure 3: Example Patch Antenna E Design Exercise Design a 3GHz square microstrip patch antenna on ... documented The written design procedure includes all of the necessary data to enable students to design the three selected antennas Next, simulations for each of the antenna designs were performed...

Ngày tải lên: 01/11/2022, 23:09

... Lan truyền vô tuyến (Radio Wave Propagation) GV: TS Trần Thị Minh Khoa Email: ttmk84@gmail.com Trang 2• Sóng điện từ (Electromagnectic wave) – Sóng vô tuyến (Radio wave) • Antenna – Độ lợi (Gain) ... từ (Electromagnectic wave)Trang 6Sóng điện từ (Electromagnectic wave)Trang 7Sóng điện từ (Electromagnectic wave)• Tốc độ = bước sóng * tần số Trang 8Sóng vô tuyến (Radio wave)• Là một kiểu sóng ... highly directional antenna Trang 17Độ lợi (Gain) của antenna• Độ lợi của antenna – Đo tính có hướng của antenna – Là công suất phát ra theo 1 hướng cụ thể so với thông số chuẩn của 1 antenna đẳng hướng...

Ngày tải lên: 27/12/2022, 09:40

... refractive index, humidity, temperature) in some areas of Vietnam using radio wave data and WRF model; The study applies radio wave data sources and WRF model simulation of atmospheric parameters ... Nghia Do area CHAPTER 1 OVERVIEW OF THE USE OF RADIO WAVE DATA AND NUMERICAL MODELS IN ATMOSPHERIC RESEARCH 1.1 Overview of the use of radio wave data for studying and assessing atmospheric ... (1) A overview study of radio observation methods, model calculations, and evaluation of related Trang 53 atmospheric parameters (2) Research on methods of using radio wave data (GPSRO and surface...

Ngày tải lên: 07/05/2025, 15:27

... relationship between the antenna diameter and3-dB beamwidth,u3db, as shown in Figure 5.2, is given by: Trang 3u3dB< 65lwherel is the transmission wavelength (m); D is the antenna diameter (m) ... frequency and the diameter of the antenna For example, a 1 m receiver antenna operating operat-in the C-band (4 GHz) has a 3-dB beamwidth of roughly 4.98 The same antenna operatoperat-ing operat-inthe ... of an antenna to discriminate between awanted polarised waveform and its unwanted orthogonal component is termed its cross-polardiscrimination (XPD) When dual polarisation is employed, an antenna’s...

Ngày tải lên: 14/09/2012, 11:26

... considered system, there is one source with N S antennas, one relay with M R receive antennas and N R transmit antennas, and one destination with M D antennas, as shown in Fig 2.1 At the first hop, ... and Initialization 81 4.3 Uplink Transceiver Design 82 4.3.1 System model and analogy with downlink design 82 4.3.2 Uplink transceiver design for fully loaded or overloaded systems ... errors From different designpurposes or to tackle different problems, the criteria of transceiver design can bevarious In general, there are two criteria for transceiver design: capacity maxi-mization...

Ngày tải lên: 20/11/2012, 11:31

... Yet,most of these works are designed for single antenna multi-user systems In a recent work on QoS-based scheduling design in multi-user MIMO system [38], the base station antennas are allocated to ... scheduling design under var-ious practical physical layer and network layer constraints for a wireless system with one basestation (with N antennas) and K mobile users (each with a single antenna) ... Adaptive Design in Multi-user Wireless Network 13 2.2.1 Adaptive Design in Physical Layer 13 2.2.2 MAC Layer Scheduling Model 15 2.3 Linear Transmit-receive Processing in Multi-antenna...

Ngày tải lên: 20/11/2012, 11:36

... data radio [15]. They effectively limit the data radio range. As low power wake-up radio provides short radio ranges, senders must be within a short distance away to trigger the wake-up radio. ... the data radio for wake-up radios [12,14,15], the [12] requires a specific 2 GHz transmitter to be its data radio. However, our design and [14,15] can use an off-the-shelf IEEE 802.15.4 radio to ... wake-up radio Overview This article provides the high sensitivity wake-up radio. It can have a l onger wake-up range, up to 4 times the data radio’s radio range. It also can use IEEE 802.15.4 radio...

Ngày tải lên: 21/06/2014, 02:20

... and a novel cross-layer design to improve the utilization of radio resource was proposed The pro-posed TSA scheme decreases the transmission overhead by regularizing the radio resources for individual ... broadcast the arrangement of radio resources to all mobile stations within the coverage of the same base station This overhead greatly affects the utilization of valuable radio resources In this paper, ... overhead, QoS, WiMAX 1 Introduction Channel quality is the basis of radio resource allocation for QoS traffic streams in OFDMA systems The radio resources allocated and the modulation scheme adopted...

Ngày tải lên: 21/06/2014, 02:20

... Traveling -Wave Antennas 10-1 General Traveling Waves, 475 474 CONTENTS xiii 10-1.1 Slow Wave, 478 10-1.2 Fast Waves (Leaky Wave Structure), 480 10-2 Long Wire Antennas, 481 10-2.1 Beverage Antenna, ... MODERN ANTENNA DESIGN Second Edition THOMAS A MILLIGAN IEEE PRESS A JOHN WILEY & SONS, INC., PUBLICATION MODERN ANTENNA DESIGN MODERN ANTENNA DESIGN Second Edition THOMAS ... 10-2.2 V Antenna, 482 10-2.3 Rhombic Antenna, 483 10-3 Yagi–Uda Antennas, 485 10-3.1 Multiple-Feed Yagi–Uda Antennas, 492 10-3.2 Resonant Loop Yagi–Uda Antennas, 495 10-4 Corrugated Rod (Cigar) Antenna, ...

Ngày tải lên: 27/05/2014, 03:57

... article and gives some perspectives Existing studies on radio wave propagation in curved tunnels Different approaches to model the radio wave propagation in tunnels were presented in the literature ... Steier, Waveguides: characteristic modes of hollow rectangular dielectric waveguides Appl Opt 15(5), 1334– 1340 (1976) A Emslie, R Lagace, P Strong, Theory of the propagation of UHF radio waves ... governing the radio wave propagation in straight and curved rectangular tunnels IEEE Trans Antenn Propag 57(10), 3249–3257 (2009) S Mahmoud, Characteristics of electromagnetic guided waves for communication...

Ngày tải lên: 18/06/2014, 22:20

... Chang Chapter Design of a Very Small Antenna for Metal-Proximity Applications Yoshihide Yamada 77 Chapter Using Metamaterial-Based Coplanar Waveguide Structures for the Design of Antennas on Passive ... The following chapters focus on tag antenna design The most commonly used antenna for RFID tags is the dipole antenna and a novel technique for matching the antenna impedance with the input impedance ... receiving antenna shown in Fig is a tag antenna, then the load presented to the tag antenna is a chip In fact, the transmission line between the tag antenna and the chip is very short, hence the antenna...

Ngày tải lên: 19/06/2014, 23:20

... Advanced Radio Frequency Identification Design and Applications Tag antenna design In Section 2, a few fundamental parameters such as gain, impedance match, polarisation etc, in designing antennas ... seen But it is known that this commercial antenna design is based on a patch antenna Hence, in the simulation we designed a patch antenna as the reader antenna with geometrical and electrical parameters ... two antennas (a reader antenna and a tag antenna) transmission system to be a two port system, as shown in Fig 5, in which the reader and chip are connected to the reader antenna and the tag antenna...

Ngày tải lên: 19/06/2014, 23:20

... the fabricated K3-27.5° antenna Fig 10 Photograph of the fabricated (P3) antenna (a) (b) Fig 11 Measured radiation pattern of (a) (K3-27.5°) antenna and (b) (P3) antenna Design and Fabrication ... Advanced Radio Frequency Identification Design and Applications (a) Frequency (MHz) (b) Frequency (MHz) Fig 20 Measured RL for the fabricated antenna: (a) S3-45° antenna, (b) S3-60° antenna It ... shows the return loss (RL) of the designed loop antennas of 50Ω balanced feed port, and Table summarizes the simulated results of the designed loop antennas Antenna type Return Loss (dB) BW (MHz)...

Ngày tải lên: 19/06/2014, 23:20

... 50 Advanced Radio Frequency Identification Design and Applications Salama A M A., (2010) Antennas of RFID Tags, Radio Frequency Identification Fundamentals and Applications Design Methods ... Engineering: The Theory and Design of Fractal Antenna Arrays IEEE Antennas and Propagation Magazine, Vol.41, No.5, (1999) ,page numbers (37-58) 3 Design of RFID Coplanar Antenna with Stubs over ... and presented 64 Advanced Radio Frequency Identification Design and Applications Antenna configuration and basis 2.1 UFH RFID meander-line antenna The typical dipole antenna consists of two parts,...

Ngày tải lên: 19/06/2014, 23:20

... metal-proximity tag antennas are given in Table 2.1 Some examples of metal-proximity antennas are patch antennas [2] and slot antennas [3], which can be 78 Advanced Radio Frequency Identification Design and ... construct tag antennas that are suitable for use with metallic objects, and some promising antenna types have been proposed In this chapter, design approaches for metal-proximity antennas (antennas ... Patch antenna [3] Slot antenna ・ Frequency ： 953MHz ・ Thickness : 16mm ・ Read range ： 8m ・ Researching [4] Normal mode helical antenna Table 2.1 Metal-proximity tag antennas receiving antenna...

Ngày tải lên: 19/06/2014, 23:20

... efficiently both as a dipole antenna and as a microstrip antenna has been proposed (Mohammed et al., 2009) The antenna behaves as a dipole antenna in free space and acts as a patch antenna when it is attached ... useful for Using Metamaterial-Based Coplanar Waveguide Structures for the Design of Antennas on Passive UHF RFID Tags 123 designing a successful antenna on a passive UHF RFID tag Notice that ... attributed to the antenna gain of Fig 5.13 The effectiveness of the tag is confirmed by the aforementioned read-range measurement Antenna in free space Conventio nal Antenna 16mm Read range 9m Antenna...

Ngày tải lên: 19/06/2014, 23:20

... was the tag antenna The antennas were grouped into two types: a dipole and a ”patch-like” antenna The patch-like antenna would be more accurately described as a fat dipole The dipole antennas fared ... the RFID tag antenna Also, the input impedance of the RFID IC will have an impact on the design of the tag antenna A highly capacitive RFID IC will drive a requirement for the tag antenna to have ... reader module, and an antenna The tag is far more simple than the reader; we will regard it as an antenna and an integrated circuit (IC) or chip The reader antenna emits a radio- frequency (RF)...

Ngày tải lên: 19/06/2014, 23:20