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International audience; A high-gain, broadband, and low-profile Continuous Transverse Stub (CTS) antenna array is presented at Ka-band for SatCom applications. This antenna is designed to cover the downlink (17.7-20.2 GHz) and the uplink (27.5-30 GHz) bands. This array comprises 16 long slots fed in parallel by a corrugated parallel plate waveguide beam forming network. The design and simulations results are summarized, together with a simple design methodology for different network components. The dual-linear polarization is achieved by using two orthogonal modes namely: the quasi- transverse electric magnetic mode (QTEM) and the 1st order transverse electric mode (QTE(1)). The antenna array is well matched (S-11 < - 10 dB). The maximum realized gain (in one plane) is around 15 dB at 29 GHz and around 12 dB at 19 GHz for both polarizations.

A Ka-band waveguide continuous transverse stub antenna array with full-corporate-feed network is presented in this paper. Multiple-section stepped-impedance transformers are used for wideband impedance matching of the radiation slots. The required high-quality quasi-TEM wave excitation is generated by a wideband plane-wave generator (WPWG). Compared with the conventional pillbox structure, the WPWG produces a quasi-TEM wave with more uniform amplitude distribution. By using the combination of these design features, significant increases both in bandwidth and antenna aperture efficiency are achieved. For demonstration, a prototype is designed, fabricated, and measured. Excellent agreement is achieved between simulations and measurements. The antenna is matched over the entire Ka-band of 26–40 GHz. A high antenna aperture efficiency of over 75% and a low cross-polarization of less than −46 dB are achieved over the entire bandwidth. The demonstrated features of wideband, high aperture efficiency, and low cross-polarization have great potentials for millimeter-wave applications.

International audience; We introduce here a new continuous transverse stub (CTS) antenna architecture compatible with standard, low-cost printed circuit board (PCB) technology for in-package systems. This enables a reduction of the cost, fabrication complexity and size of the antenna module. The antenna operates at E-band and its design, fabrication and experimental results are presented. To our knowledge, this is the first time that this technology is applied to CTS antennas. The measurement results are very promising the radiation patterns are well-shaped, the gain variation over the 71-86GHz is lower than 3dB and the maximum measured gain is 17.2dBi.

International audience; This paper presents four innovative continuous transverse stub (CTS)-pillbox antenna prototypes recently designed at IETR. Beside the very attractive performance achieved by this architecture in terms of bandwidth and compactness, new capabilities are demonstrated such as high gain, reduced sidelobe level, radiation pattern reconfiguration in principal planes and active beam switching with a high beam overlapping level. Moreover, new fabrication technologies have been investigated printed circuit board (PCB)-air hybrid technology, full PCB technology, and low-temperature co-fired ceramic (LTCC) technology. All concepts are validated by experimental results. These works constitute a substantial advancement for CTS-pillbox antennas for current and future millimeter-wave applications.