Joint sparsity‐driven three‐dimensional imaging method for multiple‐input multiple‐output radar with sparse antenna array

The design of a multiple-output transmitter for digital beamforming (DBF), Multiple-Input Multiple-Output (MIMO) and channel sounder applications, based on Direct Digital Synthesis (DDS) system is presented and investigated in terms of antenna array performance. DDS generates independently modulated signals on specific carrier frequencies and is employed as the first stage in the proposed implementation, furnishing output signal of configurable amplitude, phase and frequency. The resulting phase progression, amplitude and beamforming accuracy of a beam steering array are further investigated, showing that the proposed architecture can provide a steering beam with high accuracy. Experimental results of system performance indicate that this architecture can drive efficiently and accurately an antenna array with independent modulated RF signals, with programmable frequency, initial phase, and magnitude.

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Microstrip Antenna Array Design for Generalized Spatial Modulation—Multiple Input Multiple Output (GSM-MIMO) Applications

Lecture Notes in Networks and Systems - Proceedings of International Conference on Recent Advancement on Computer and Communication ◽

10.1007/978-981-10-8198-9_9 ◽

2018 ◽

pp. 83-94

Author(s):

Raj Rajeshwari Lunawat ◽

Debashis Adhikari ◽

Priyanka Tupe Waghmare

Keyword(s):

Antenna Array ◽

Microstrip Antenna ◽

Multiple Input Multiple Output ◽

Spatial Modulation ◽

Array Design ◽

Multiple Input ◽

Microstrip Antenna Array ◽

Input Multiple Output

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Compact four-port vertically polarized UWB monopole antenna for MIMO communications

Circuit World ◽

10.1108/cw-04-2020-0055 ◽

2020 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Premalatha J. ◽

Sheela D.

Keyword(s):

Antenna Array ◽

Performance Metrics ◽

Multiple Input Multiple Output ◽

Unit Cell ◽

Ultra Wideband ◽

Mimo Communications ◽

Content Type ◽

Directional Radiation ◽

Multiple Input ◽

Input Multiple Output

Purpose This paper aims to present the design of a compact vertically polarized four-element UWB antenna suitable for MIMO communications. Design/methodology/approach The unit cell antenna is constructed using a square ring radiator excited through a stepped impedance feed. The proposed antenna covers the Ultra-wideband (UWB) spectrum ranging from 2.2 to 12.3 GHz. The isolation between the unit cell antennas in the array is enhanced using a simple microstrip line resonator. The decoupling element is connected to the ground through a via. Findings The proposed scheme offers at least 16 dB improvement in the port-to-port coupling. Furthermore, the four-element antenna array is constructed using a specific interlocking scheme. The proposed antenna array’s Multiple Input Multiple Output (MIMO) performance metrics are analyzed. Originality/value By suitably selecting the excitation port, directional radiation patterns can be realized. The combined radiation pattern covers 360 degrees. A prototype antenna array is fabricated, and the simulation results are verified using real-time experiments. The proposed antenna is a suitable candidate for shark fin housing in automotive communications.

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