Orthogonal Methods for Array Synthesis

Sahalos, John N.

doi:10.1002/0470028548

Cited by 51 publications

(9 citation statements)

References 92 publications

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“…The above procedure proves that for a given non-uniformly spaced linear array, the element excitation coefficients for a desired array factor can be achieved [9].…”

Section: Introduction Synthesis Of Linear Array With Gram-schmidt Ortmentioning

confidence: 87%

“…Moving jammers represent a serious problem because for high gain large antennas, the directional pattern nulls are extremely sharp, and jammers may soon move out of the nulls, i.e., such antennas are very sensitive to this type of nonstationarity. There are several methods that have been proposed for interference suppression [2][3][4][5][6][7][8][9][10]. Broadened the width of the pattern nulls in the jammer directions is a common method, but disadvantages of this method are large computational load and poor real time.…”

Section: Introductionmentioning

confidence: 99%

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A method for synthesizing pattern with broad null

et al. 2013

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Based on the Gram-Schmidt orthogonalization method utilized for pattern synthesis of linear array without constraints, side lobe levels constraints in certain angular region is proposed to implement pattern synthesis with broad nulls. The advantage of the simplified computation resulted from steering vector orthogonalization in unconstrained orthogonal approach is maintained, and the uniform or non-uniform linear array pattern synthesis can be realized by this method. The computational complexity of this method is smaller than iterative algorithm method's. The experimental results show that the side lobe levels constrained orthogonal approach can fulfill linear array broad null pattern synthesis with less computational efforts.

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“…The above procedure proves that for a given non-uniformly spaced linear array, the element excitation coefficients for a desired array factor can be achieved [9].…”

Section: Introduction Synthesis Of Linear Array With Gram-schmidt Ortmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A method for synthesizing pattern with broad null

et al. 2013

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“…Based on the design of the meander line, the dipoles of the array have the desired inter-element distance. The next step has to do with the calculation of the antenna array pattern and the near-zone electric field using the classical expressions of the EM field of arbitrary oriented dipoles and array analysis [5]. Fig.…”

Section: Design Of a Meander-shaped Line For The Element Excitationmentioning

confidence: 99%

“…Deployment of such systems may help reduce labor cost and improve productivity at workplace [3]. Using RFIDs, is expected to: (1) replace traditional timeconsuming processes for checking items in and out of the buildings; (2) automate labor-intensive and time-consuming stock-taking processes; (3) improve productivity at workplace by eliminating tedious and paper-bound processes traditionally followed during inventory taking; (4) reduce running cost due to a more productive and highly efficient working environment; (5) reduce theft counts and the number of missing or misplaced items; (6) facilitate inventory monitoring of high-valued assets; (7) assist with determining demand trends; (8) improve the effectiveness of the supply chain etc.…”

Section: Introductionmentioning

confidence: 99%

A UHF RFID reader antenna for searching tagged items

Boursianis

Samaras

Polycarpou

et al. 2014

2014 IEEE RFID Technology and Applications Conference (RFID-TA)

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In this work, a mobile atenna of a UHF RFID reader for searching tagged items on the shelves is presented. The antenna consists of a microstrip array of alternating orthogonal double dipoles which are fed in series by a meander microstrip line. The individual dipoles are designed such as to provide high bandwidth. The distance between the double dipoles is adjusted in order to excite them in phase at 867MHz and create two orthogonal electric-field components. The number of dipoles and the inter-element distance create beams with direction diversity. Based on the analysis of the pattern and the radiated field in the near-field zone, it was found that a semicylindrical area around the axis of the antenna is sufficiently covered.

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“…Many excellent textbooks and literatures present several treatments on the synthesis problem [6]. Among them the orthogonal method was researched extensively by Sahals [7]. The method is a relatively simple approach to the design of antenna arrays.…”

Section: Introductionmentioning

confidence: 99%

Rectangular array pattern synthesis with simple method

Huang

Cheng

2008

2008 9th International Conference on Signal Processing

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A simple method for rectangular array pattern synthesis, which combines convolution of two perpendicular linear arrays with orthogonal approach for each linear array synthesis, is proposed. Because beam patterns derive from Fourier transforms of distributions in space, the distribution to produce the product of two simpler patterns is the convolution of the simpler distributions. A desired rectangular array pattern can be synthesized through multiplication of two perpendicular linear array patterns. At the same time, the relatively simple and general orthogonal method is applied for linear array synthesis to reduce the amount of computation further.

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Orthogonal Methods for Array Synthesis

Cited by 51 publications

References 92 publications

A method for synthesizing pattern with broad null

A method for synthesizing pattern with broad null

A UHF RFID reader antenna for searching tagged items

Rectangular array pattern synthesis with simple method

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