A Stacked Planar Antenna with Switchable Small Grid Pixel Structure for Directive High Beam Steering Broadside Radiation

Subramaniam, D.; Jusoh, Muhammad Shahar; Sabapathy, Thennarasan; Osman, Mohamed Nasrun; Kamarudin, Muhammad Ramlee; Ali, Mohd Tarmizi; Yasin, Mohd Najib Mohd; Ali, Azuwa; Majid, H. A.; Rahim, Robbi

doi:10.14419/ijet.v7i2.5.13966

Cited by 12 publications

(9 citation statements)

References 8 publications

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“…Terminals in computer and communication devices communicate through interconnection [10], [11]. The bus topology is no longer effective as it is not scalable, adjustable and assessable.…”

Section: Interconnecting Networkmentioning

confidence: 99%

Cross-Point Comparison of Multistage Non-Blocking Technologies

Zulfin¹,

Suherman²,

Fauzi³

et al. 2018

IJET

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Multistage switching networks play important role in communication and computer network. They make communication nodes connect to each other. In computer hardware switches connect processors and memories. Initially, switches are arranged as one stage interconnection. As clients are growing, multistage is a must. The finding Clos multistage switching initiated multistage technologies. Benes improves Clos by reducing number of cross-points by using a 2 x 2 switch element and call re-routing. Batcher improves the technology by other way which is sorting destination address. Banyan is then joined to Batcher to simplify routing control. This paper analyses the number of cross-point required in Clos, Benes and Batcher Banyan to accomplish multistage switching architecture of 16, 64, 256, 1024 and 2048 input/output ports. As results, Clos cross-point is in averages 495.24% higher than Benes and 160.30% higher than Batcher Banyan. Clos blocking probabilities are closed to zero. Benes blocking probabilities are conditionally zero. Batcher Banyan blocking probabilities are zero.

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“…Terminals in computer and communication devices communicate through interconnection [10], [11]. The bus topology is no longer effective as it is not scalable, adjustable and assessable.…”

Section: Interconnecting Networkmentioning

confidence: 99%

Cross-Point Comparison of Multistage Non-Blocking Technologies

Zulfin¹,

Suherman²,

Fauzi³

et al. 2018

IJET

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“…As buildings dominate obstacles within urban area, modeling signal propagation is more complicated than suburban and rural area. Since minimizing repeater existence within building is preferred, indoor propagation relies on signal availability from outdoor [1]- [3]. The outdoor propagation is mostly influenced by buildings and trees density [4], while indoor propagation is affected by the density of walls, floors and furniture [5].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Outdoor to Indoor Propagation in Urban Area by Using A Combination of COST231 Walfisch-Ikegami and COST231 Multiwall Models in 1800 Mhz and 2100 Mhz

Pinem¹,

Zulfin²,

Suherman³

et al. 2018

IJET

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Increasing numbers of the mobile communication users in urban city; especially indoor users cause the radio coverage prediction of outdoor to indoor becoming important. Obstacles are the main problems for outdoor to indoor propagation that weaken signal level and worsen information detection. This paper proposes a combination of COST231 Walfisch-Ikegami and COST231 Multiwall to predict the received signal. By comparing the predicted and the measured signal level in the Antara building, Medan city for both 1800 MHz and 2100 MHz channels, the proposed model outperforms the compared method in predicting signal level. The proposed model is able to suppress the prediction deviation 11.035 dB lower than the compared method for Sector A and 5.98 dB lower at Sector B.

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“…A very high frequency is suitable for underground propagation as its signal can penetrate deep underground, and requires low transmitting power. This frequency has been used for mining worker [3], [4]. The VHF signal is good deliver electromagnetic power, but is sensitive to the ground characteristics.…”

Section: Introductionmentioning

confidence: 99%

Underground Radio Propagation on Frequency Band 97 Mhz – 130 Mhz

Suherman¹,

Rambe²,

Tanjung³

2018

IJET

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Radio communications do not work only in the air and underwater, but also underground. Some applications such as mining and earthquake detection require underground radio devices. This paper reports an assessment of underground radio characteristics for frequency band 97 MHz to 130 MHz. The assessments were performed through an experimental propagation measurement and a mathematical prediction. Both assessments then are compared by using the normalized graph to predict propagation characteristics so that correct link budget for future application can be assisted. The mathematic analysis and measurement results still produce huge errors; achieving 50.33% for frequency 130.762 MHz, 17.58% for 109.818 MHz and 13.38% for 97.335 MHz. Error can be minimized when the ground permittivity is more precise

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A Stacked Planar Antenna with Switchable Small Grid Pixel Structure for Directive High Beam Steering Broadside Radiation

Cited by 12 publications

References 8 publications

Cross-Point Comparison of Multistage Non-Blocking Technologies

Cross-Point Comparison of Multistage Non-Blocking Technologies

Characterization of Outdoor to Indoor Propagation in Urban Area by Using A Combination of COST231 Walfisch-Ikegami and COST231 Multiwall Models in 1800 Mhz and 2100 Mhz

Underground Radio Propagation on Frequency Band 97 Mhz – 130 Mhz

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