Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Khanna, Rajesh
- Design of Coaxial Fed Microstrip Patch Antenna for Wi-MAX/ IMT Applications
Abstract Views :792 |
PDF Views:0
Authors
Affiliations
1 Department of Electronics and Communication Engineering, Thapar University, Patiala-147004, Punjab, IN
1 Department of Electronics and Communication Engineering, Thapar University, Patiala-147004, Punjab, IN
Source
Research Journal of Engineering and Technology, Vol 4, No 1 (2013), Pagination: 40-44Abstract
In this paper, a single layer, single co-axial feed, broadband, compact rectangular microstrip patch antenna is proposed. This proposed antenna is constructed by cutting a -shape slot under a Pi-shape slot in the patch fabricated on a substrate with relative permittivity 2.33 and thickness 8mm using simple coaxial feeding technique. In addition, four circular slots have been cut into the radiating edges of patch for broadband operation to cover both Wi-MAX (3400MHz-3690MHz) & IMT (3900MHz-4400MHz) communication standards. Basically, the use of these circular slots has effectively excited multi-resonant modes together with good impedance bandwidth. A thick substrate helps broaden the bandwidth for covering the entire frequency range of Wi-MAX & IMT communication standards. The proposed slot loaded patch antenna resonates at 2.66 GHz and has a broadband from 3.4 GHz to 4.5 GHz with the corresponding bandwidth of 108 MHz and 1.14 GHz and return losses of -16.0 dB and -22.6 dB respectively. The antenna gives a stable radiation performance with gain greater than 7dB over the entire broadband. The simulation has been performed by using CST Microwave Studio, which is a commercially available full wave electromagnetic simulator based on the method of finite difference time domain technique. Meanwhile, the proposed antenna exhibit almost omni-directional radiation pattern, relatively high gain and low cross polarization. Results for reflection coefficient and far-field radiation pattern of the designed antenna are presented and discussed. The analysis of the simulated results confirms successful design of co-axial fed microstrip patch antenna (MPA).Keywords
Wi-MAX, IMT, Broadband, Impedance Bandwidth, Microstrip Patch Antenna (MSA), CST Microwave Studio.References
- Garg R, Bhartia P, Bahl I and Itipiboon A. Microstrip antenna design handbook. Artech House, Boston – London, 2000.
- Pigin P. Emerging mobile WiMax antenna technologies. IET Communication Engineer, October/ November 2006.
- Kaur J, Khanna R and Kartikeyan MV. Comparison of Un-slotted and Slotted rectangular MSA for Wireless Applications. MIT Int. J. Electronics and Comm. Engg. 2011, 1, 57-59.
- Ahuja N, Khanna R and Kaur J. Dual Band Defected Ground Microstrip Patch Antenna for WLAN/WiMax and Satellite Application. Int.J. Computer Applications 2012, 48, 22.
- Schaubert DH, Pozar DM and Adrian A. Effect of Microstrip Antenna Substrate Thickness and Permittivity: Comparison of Theories with experiment. IEEE Trans. Antennas and Propagation. 1989, 37, 667- 682.
- Balanis CA. Antenna Theory Analysis and Design. Third edition, Wiley, New Jersey, 2005.
- BER Evaluation of LDPC Codes with GMSK in Nakagami Fading Channel
Abstract Views :164 |
PDF Views:0
Authors
Affiliations
1 Department of Electronics and Communication Engineering, Thapar University, Patiala, IN
1 Department of Electronics and Communication Engineering, Thapar University, Patiala, IN
Source
ICTACT Journal on Communication Technology, Vol 1, No 2 (2010), Pagination: 113-117Abstract
LDPC codes (Low Density Parity Check Codes) have already proved its efficacy while showing its performance near to the Shannon limit. Channel coding schemes are spectrally inefficient as using an unfiltered binary data stream to modulate an RF carrier that will produce an RF spectrum of considerable bandwidth. Techniques have been developed to improve this bandwidth inefficiency or spectral efficiency, and ease detection. GMSK or Gaussian-filtered Minimum Shift Keying uses a Gaussian Filter of an appropriate bandwidth so as to make system spectrally efficient. A Nakagami model provides a better explanation to less and more severe conditions than the Rayleigh and Rician model and provide a better fit to the mobile communication channel data. In this paper we have demonstrated the performance of Low Density Parity Check codes with GMSK modulation (BT product=0.25) technique in Nakagami fading channel. In results it is shown that average bit error rate decreases as the 'm' parameter increases (Less fading).Keywords
Channel Codes, LDPC, Density Evaluation, GMSK, Nakagami Fading.- Novel Edge Fed Planar Inverted F Antenna (PIFA) for LTE High Band Applications
Abstract Views :141 |
PDF Views:0
Authors
Affiliations
1 ECED, Thapar University, Patiala - 147004, Punjab, IN
2 ECED, Thapar University, Patiala - 1470in04, Punjab, IN
1 ECED, Thapar University, Patiala - 147004, Punjab, IN
2 ECED, Thapar University, Patiala - 1470in04, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 9, No 47 (2016), Pagination:Abstract
In this paper an edge fed planar inverted F antenna (PIFA) for LTE high band applications. The proposed antenna covers wider bandwidth from 2.78GHz to 3.94 GHz. Edge feed mechanism is used in the proposed structure by which wider bandwidth is achieved. The dimension of patch is 14×16mm2 and of ground plane is 36×16mm2. The dimension of patch, shorting plate, feeding plate are optimized using CST software to get optimum results and is presented in this paper. As this antenna is very compact in profile, has good performance, low cost and light weight, due to all these advantages it is suitable and can be easily incorporated as an internal antenna in mobile phones and in other portable device.Keywords
Compact Profile, Edge Feed, High Band, LTE, PIFA.- Analysis of Hybrid Diversity Combining Technique over TWDP Fading Channel
Abstract Views :139 |
PDF Views:0
Authors
Affiliations
1 ECE Department, Thapar University, IN
1 ECE Department, Thapar University, IN
Source
Indian Journal of Science and Technology, Vol 9, No 47 (2016), Pagination:Abstract
Background/Objectives: Tremendous growth in the mobile communication services in this technology driven era has made possible for the people to exchange information (data, voice or image) with each other while they are on the move. These wireless systems have brought a revolution in the current market for their high data rates and performance enhanced features. Methods/Statistical Analysis: One of the key issues affecting the performance of a wireless channel is the random variations in the signal strength which may be resulted due to some obstructions like buildings, trees, etc. or due to the movement of the mobile user. This leads to stochastic behavior of the radio channel.. A highly faded Two-Wave with Diffuse Power (TWDP) environment is discussed along with hybrid diversity combining technique. The effectiveness of this scheme is further evaluated by analyzing the system performance in terms of Bit Error Rate (BER) vs Signal to Noise Ratio (SNR). Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK) modulation techniques were employed. Findings: It has been shown clearly that TWDP forms the poorer link when compared with other fading channels as BER is higher in this case. Moreover, TWDP fading environment can serve as the worst case scenario in wireless communication system. Also it has been shown as the diversity order increases system’s performance is improved in terms of BER and reduction in SNR requirement to achieve a constant BER value. Application/Improvement: This paper presents the need to obtain a clear perception of channel characteristics and to model a system for combating fading and improving the system performance by considering a TWDP fading channel instead of Rayleigh channel while designing a wireless communication system in worst channel conditions..Keywords
Bit Error Rate (BER), Diversity Combining, Maximal Ratio Combining (MRC), Selection Combining (SC), Two- Wave with Diffuse Power (TWDP).- A Novel Compact Band Pass Filter for 2.4 GHz ISM Band Applications
Abstract Views :216 |
PDF Views:0
Authors
Affiliations
1 ECED, Thapar University, Patiala – 147004, Punjab, IN
1 ECED, Thapar University, Patiala – 147004, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 9, No 47 (2016), Pagination:Abstract
A novel compact microstrip Band Pass Filter comprising Hewlett-Packard logo shaped patch is proposed in this paper. The filter structure is able to achieve 2.4 GHz central frequency which can be used for Wireless fidelity (WLAN) and the short range devices such as Bluetooth applications. The simulation is performed on CST Microwave Studio. The dielectric substrate used is FR-4 with thickness 1.6 mm. The structure shows good return loss and filter characteristics.Keywords
Bandpass, Hewlett-Packard, WLAN.- Performance Analysis of Mixed Carbon Nano Tubes as VLSI Interconnects
Abstract Views :127 |
PDF Views:0
Authors
Affiliations
1 Electronics and Communication Department, Thapar University, Patiala – 147004, Punjab, IN
1 Electronics and Communication Department, Thapar University, Patiala – 147004, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 10, No 16 (2017), Pagination:Abstract
Background/Objectives: This paper presents various possible structures of Mixed Carbon Nano Tubes bundle which consists of different topology of Single Wall Carbon Nano Tubes (SWCNTs) and Multi wall Carbon Nano Tubes (MWCNTs). Methods/Statistical Analysis: It is assumed in this paper that SWCNTs and MWCNTs are densely packed. An equivalent single conductor model is derived for all the bundles of Mixed CNT. Findings: Performance is analyzed by considering parameters like Propagation delay, Power dissipation and Crosstalk delay of the interconnects having different lengths. Applications: Carbon Nanotubes finds applications in many fields such as biomedical applications, air and water filtration, structural applications etc.Keywords
Crosstalk, Equivalent Single Conductor (ESC), Mixed Carbon Nano Tubes (MCB), Power Dissipation.- A Review of Various Multi-Frequency Antenna Design Techniques
Abstract Views :132 |
PDF Views:0
Authors
Geetanjali
1,
Rajesh Khanna
2
Affiliations
1 Thapar University, Patiala – 147004, Punjab, IN
2 ECED, Thapar University, Patiala – 147004, Punjab, IN
1 Thapar University, Patiala – 147004, Punjab, IN
2 ECED, Thapar University, Patiala – 147004, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 10, No 16 (2017), Pagination:Abstract
Background/Objectives: The paper caters to the need for multi banding of Micro Strip Antennas (MSAs), that has been well recognized as one of the major research issue in antenna engineering in 21st century. Methods/Statistical analysis: Wireless applications, supporting multiband standards have put new demands on antennas related to bandwidth, gain, size and efficiency. Recent efforts by several researchers around the world to achieve multiband geometry have led to an emergence of new and innovative antenna designs which are presented in this paper. Findings: This paper gives a comprehensive review of various techniques to design compact, multiband planar antennas for wireless devices and applications. The theoretical concept to achieve multi frequency antenna along with related issues for designing have been generally and briefly discussed. Especially, the design examples, some of which are published in literature are presented for the illustration purpose. Recent techniques like EBG/AMC, SRR/CRR, FSS and DGS have also been included in this review. Application/Improvements: These antennas find their extensive use in different wireless applications in the field of communication, medical stream and satellite communication. The innovations in technology have been presented which includes improved antenna designs using better techniques for enhanced performance in the respective fields.Keywords
Defected Ground Plane Structures, Electromagnetic Band-Gap, Fractals, Frequency Selective Surfaces, Micro Strip Antenna, Multi Banding, Notching, Slotting, Split Ring Resonators.- Ultra-Wide Band Antenna Design using Stairs for Personal Area Network Wireless Application
Abstract Views :176 |
PDF Views:0
Authors
Affiliations
1 Chandigarh Engineering College, Mohali - 140307, Punjab, IN
2 Thapar University, Patiala - 147004, Punjab, IN
1 Chandigarh Engineering College, Mohali - 140307, Punjab, IN
2 Thapar University, Patiala - 147004, Punjab, IN