The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In the late 1990's Professor Per-Simon Kildal got the idea that reverberation chambers could be used for characterizing small antennas and mobile devices. Many thought the idea was crazy but he was persistent and worked hard to realize his dream to build a small chamber that could be used by the wireless industry. This paper gives a short history of the research at Chalmers and the creation of the...
Purely passive, mechanically steered waveguide-fed horn arrays are good candidates to satisfy the current need for low-to-medium-profile antennas for mobile user terminals for SATCOM applications. In this work, a unique waveguide feed architecture is proposed, which enables the realization of grating lobe-free, wideband, low-profile waveguide-fed horn arrays operating with dual circular polarization...
This paper introduces the heritage of Mitsubishi's phased array antennas(PAA's) development focusing on mobile satellite communication terminals from commercialization of product standpoint.
This paper proposes a method of constructing an antenna array on the typical ground plane of the modern mobile terminal. An IFA and a slot in a metal frame antenna elements have been used to illustrate the proposed method. The radiation pattern of the element is recorded at the chosen number of the discrete locations on the ground plane. Antenna elements at the positions, where the boresight is similar...
MIMO technology allows high-data rates in wireless devices. A 4 × 4 MIMO multiband antenna system is proposed using small non-resonant elements placed each one at different corners of a smartphone platform. Electromagnetic analysis as well as an experimental demonstrator show that a compact solution using four non-resonant elements of 10 mm × 3.2 mm × 3.2 mm operating at 824MHz-960MHz and 1710MHz-2400MHz...
With the future LTE auction for TV white spaces at 600 MHz, there is a strong need for efficient handset antennas operating at very low frequencies. This paper proposes a tunable antenna design for the low bands of LTE. In this design, not only the antenna is tuned but also the resonance of the board, thanks to using a tunable parasitic. The resulting dual-resonant antenna exhibits a peak total efficiency...
It has become a popular trend in using metallic housing for mobile phone. The metallic housing often posts a great challenge towards the design of internal antenna which is used commonly in mobile devices. As such, it has become a common practice that most will integrate the metallic housing as part of the antenna for the mobile phone. This paper presents an antenna solution for mobile phone with...
A small size, planar dual wideband antenna for smartphone applications is proposed. The proposed antenna supports the multiple communication protocols including the GPS/GLONASS, DCS, PCS, UMTS2100, Bluetooth LTE2300/2500/3400 and 2.4-GHz WLAN and WiMAX 2.3/2.5/3.5GHz bands. The planar antenna is printed on 0.8mm thick FR-4 substrate and occupies the area of 30.5×9.2mm2. The antenna comprises of a...
A frame antenna based on the inverted-F antenna (IFA) structure for the LTE (long term evolution) metal-casing smartphone is presented. The antenna uses a frame section along the short edge of the metal casing as the IFA's radiating strip. There are no gaps required at the two side edges of the smartphone. The frame section is connected to a feed circuit board (FCB) to achieve wider bandwidth. With...
A compact LTE frame antenna with a 2-mm narrow metal clearance for the metal-casing smartphone is presented. The antenna requires only a radiating metal frame section of about a half of the short edge of the smartphone. The metal frame section is fed by a radiating feed network, which includes a feed network and two radiating branches. The feed network includes an inductive feed path (L-path), a capacitive...
This paper presents a simulation-based study for the number and placement of 5G antenna elements in mobile terminals operating in the frequency range from 1 to 6 GHz. Different antenna configurations are compared in terms of the ergodic capacity (bit/s/Hz) in the spatial multiplexing mode. According to the results, ergodic channel capacity increases almost linearly with the number of antenna elements...
A design of compact dual band 8-element MIMO antenna using folded monopole structures is proposed. The MIMO antenna consists of 8 folded monopole antenna elements, each two of them are symmetrically placed on the orthogonal frame corners of the substrate, and closely located to each other with no clearance on the ground. The folded monopole arms are used as radiation elements to resonate at two different...
This paper presents an investigation of the radio performance of 26 mobile phones common in the Nordic countries. Antenna performance in terms of total isotropic sensitivity (TIS) and total radiated power (TRP) of different phone models was measured. The investigation includes results for talk mode using left and right hand phantoms next to head, as well as data mode using only the hand phantom. Large...
This paper focuses on enhancing multiband isolation between two antenna elements in a reconfigurable multiple input multiple output (MIMO) system. The antennas are reconfigurable printed inverted F antennas (PIFA) that resort to two PIN diodes each to achieve frequency reconfiguration. The isolation between the antenna elements is proposed to be improved through the use of multiple nested slots in...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.