A wideband array of stacked patch antennas using embedded air cavities in LTCC

Panther, A.; Petosa, A.; Stubbs, M.G.; Kautio, Kari

doi:10.1109/lmwc.2005.859944

Cited by 51 publications

(27 citation statements)

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“…The antenna we propose avoids use of complex (and expensive for manufacturing) previously investigated techniques such as air-cavity or punching holes and demonstrates a larger than other LTCC antennas [5][6][7] relative bandwidth. The antenna is based on an ASP antenna.…”

Section: A) Antenna Geometrymentioning

confidence: 99%

“…However, these approaches will complicate the manufacturing of the antenna, lower the yield rate, and increase cost. The operational bandwidth of LTCC antennas reported in literature is typically below 18% [6,8].This paper presents a novel differentially fed UWB antenna for CWD imaging radar. The antenna should be manufactured using the LTCC technology to be ready for integration with 60 GHz MMICs for UWB front-end.…”

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confidence: 99%

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A novel LTCC differentially Fed UWB antenna for the 60 GHz band

Yang

Yarovoy

Valavan

et al. 2011

Int. j. microw. wirel. technol.

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In this paper a novel differentially fed Ultra-Wide Band (UWB) antenna in low-temperature co-fired ceramics (LTCC) technology to be used in the 60 GHz band for integrated RF front-ends is presented. The antenna is based on the aperture stacked patch fed via H-shaped aperture to achieve more than 10 GHz operational bandwidth. The antenna is fed by a parallel-wire transmission line which enables the antenna to be directly integrated with differential Monolithic Microwave Integrated Circuits (MMICs). To alleviate influence of the surface waves (efficiently excited in LTCC material due to its high dielectric constant) on the antenna radiation and realize uni-directional radiation patterns, a dedicated shield is added to the antenna. The measured results of the shielded antenna showed that the antenna has an operational bandwidth from 51 GHz to over 65 GHz, the gain is about 3.5-8 dBi, and 25 dB beamwidth is about +308. The measurement results also demonstrated that the shield indeed improves the antenna impedance bandwidth, gain, and radiation patterns substantially. I . I N T R O D U C T I O NThe demand for using the unlicensed 60 GHz band for communication and radar applications is growing rapidly. The large available bandwidth in the 60 GHz band is appealing to high data rate multimedia communications. Furthermore, the 60 GHz band is very suitable for ultra-high-resolution imaging with short-range radar, thus it is attractive for such application as concealed weapon detection (CWD) [1]. These demands have motivated many developments in the 60 GHz systems, especially in the integrated 60 GHz front-end. The low-temperature co-fired ceramics (LTCC) technology provides an effective solution enabling integration of passive components including antennas and filters with MMICs in a single, cost-effective package. In addition, the multilayer nature of LTCC technology gives the possibility to realize three-dimensional structures such as cavities and vias. The passive components can then be placed at different layers, which enable miniaturization of modules. Therefore, the research of integrated LTCC antennas is very popular, such as in [2][3][4]. Challenges of realizing antennas with the LTCC material in the mm-wave region are related to fabrication accuracy and limitations on structures such as lines, metal plates, or vias. In addition, high relative permittivity of the LTCC material may limit the bandwidth of the antenna and supports excitation of the surface waves in the substrate. As a result, several attempts have been used to lower the effective dielectric constant such as using an air cavity [5,6] or punching holes [7]. However, these approaches will complicate the manufacturing of the antenna, lower the yield rate, and increase cost. The operational bandwidth of LTCC antennas reported in literature is typically below 18% [6,8].This paper presents a novel differentially fed UWB antenna for CWD imaging radar. The antenna should be manufactured using the LTCC technology to be ready for integration with 60 GHz MMICs ...

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Section: A) Antenna Geometrymentioning

confidence: 99%

mentioning

confidence: 99%

A novel LTCC differentially Fed UWB antenna for the 60 GHz band

Yang

Yarovoy

Valavan

et al. 2011

Int. j. microw. wirel. technol.

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show abstract

“…49 This technique has also been used to create embedded air cavities, which serve as an ideal dielectric in an LTCC stacked patch antenna (with dimensions of 11 mm × 6 mm × 0.392 mm). 50 Instead of using adhesive tapes, organic liquids, such as natural honey, glucose, and polyester resins, can be used as gluing agents to bond the LTCC tapes at room temperature and under a pressure of 2.5 or 5 MPa. 51 The gluing agents are removed during the debinding stage.…”

Section: Lamination Using Adhesive Materialsmentioning

confidence: 99%

Overview on fabrication of three-dimensional structures in multi-layer ceramic substrate

Khoong

Tan

Lam

2010

Journal of the European Ceramic Society

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“…The observed saggings after sintering for suspended threelayers and six-layers self-constrained laminates were less than −120 m. These results indicated that supporting medium is not necessary during sintering for the fabrication of relatively large embedded structures (with width ranges 15-25 mm) made of self-constrained LTCC material. The fabrication of large embedded cavity is practically useful in realizing embedded air cavity for stacked patch antennas 18,19 and pressure sensor. 13 …”

Section: Deformation Of Suspended Ltcc Laminate During Sinteringmentioning

confidence: 99%