Wideband Planar Phased Array Antenna Based on Artificial Magnetic Conductor Surface

A linearly polarized conformal phased array antenna with a low profile and a large scanning range is proposed, based on stacked patch antenna element fed by a coupled microstrip line. A backed compact cavity is designed in the antenna element, to reduce the mutual coupling between the elements. The prototype of the proposed conformal array, a conformal array composed of 4 × 4 elements which are axially mounted onto a cylindrical surface, is fabricated and measured, whose profile is as low as 0.072 λ h (λ h is the freespace wavelength at the highest operating frequency). The experimental results demonstrate that the array achieves active VSWR below than 2.5 over the frequency band of 1.52-1.77 GHz (15%), within the wide-scanning ranges of ±70°in the E plane and ±60°in the H plane, and the measured results are in good accordance with the calculation.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low profile conformal phased array with wide scanning range

Cao

et al. 2023

“…1 For the traditional 4G and 5G antennas, high directional characteristics is necessary to compensate the space transmission attenuation. [2][3][4] Additionally, they should have low losses to reduce the transmitted power consumption. To achieve the goals mentioned above, as an alternative method, lens antennas are attractive due to their small size, simple manufacturing process, and good directional radiation performance.…”

Section: Introductionmentioning

confidence: 99%

Design of miniaturized and high gain dielectric lens antenna

Liang,

Wu,

Huang

et al. 2023

A miniaturized and high‐gain dielectric lens antenna is presented and demonstrated. The dielectric lens antenna is mainly composed of a spherical dielectric lens, a pedestal, and a radiating element. The spherical dielectric lens is made of a special material called cross‐linked styrene co‐polymer showing an ultra‐low dielectric loss and a stable permittivity. The pedestal is made by the 3D printing technique and used for supporting the dielectric lens. The radiating element is embedded in the bottom of the pedestal, a proper spacing between the dielectric lens and the radiating element is maintained. The proposed dielectric lens antenna shows impedance bandwidth ranging from 24.4 to 25.8 GHz and an excellent directional radiation characteristic is obtained.

“…Phased array systems have been widely used in radars and communication systems to achieve electronic beam forming and fast beam scanning. 1,2 A major issue in building a phased array is the variable gain amplifier (VGA) as shown in Figure 1, which maximizes the dynamic range and reduces the side-lobe of systems. 3 Furthermore, the characteristics of gain control linearity, bandwidth, and attenuation precision are very important if the VGA is used for ultrawideband phased array systems.…”

Section: Introductionmentioning

confidence: 99%

A 6–18 GHz high dB‐linear attenuator based on variable gain amplifier for ultra‐wideband phased array systems

Wang

Wang³

et al. 2021

The letter presents a high dB-linear attenuator based on variable gain amplifier (VGA) for ultra-wideband phased array systems. An effective dB-linear compensation structure is proposed to improve the gain range and accuracy. The bandwidth and gain flatness of the proposed VGA are increased by the emitter resistor-capacitor negative feedback and transistor segmentation technique. The proposed VGA is implemented with the 0.18 μm SiGe bipolar complementary metal oxide semiconductor (BiCMOS) process. The measured results show that the VGA can operate from 6 to 18 GHz with a controlled variable gain range of 20 dB, the root-mean-square gain error is less than 0.55 dB. The input 1 dB compression point (IP1dB) of the fabricated VGA is more than À5 dBm. The proposed VGA consumes 71 mW and occupies a chip area of 0.98 mm Â 0.98 mm.