A novel array antenna with a flat-shoulder shaped radiation pattern is proposed as the transmitting for 77 GHz automotive radar application. When it used in an comprising one transmitter and multiple identical receivers, can meet demands of both long-range medium-range detections without switching operation mode back forth between scenario scenario. The concept fully introduced to explain its mechanism. An unconventional was synthesized achieve desired pattern. Prototype also designed...

Energy efficiency is one of the key performance indicators in 5G New Radio (NR) networks targeted to support diversified use cases including enhanced mobile broadband (eMBB), massive machine type communications (mMTC) and ultra-reliable low latency (URLLC). Trade-offs have be carefully considered between energy other aspects such as latency, throughput, connection densities reliability. important for both user equipment (UE) side base station side. On UE side, battery life has great impact...

A novel band-pass Substrate Integrated Waveguide (SIW) filter based on Complementary Split ring Resonators (CSRRs) is presented in this work. Three different CSRRs cells are etched the top plane of SIW for transmission zero control. demonstration designed, fabricated and measured. It agreed with simulated results well.

In this communication, a corporate stacked microstrip and substrate integrated waveguide (SIW) feeding structure is reported to be used broaden the impedance bandwidth of 4 × patch array antenna. The proposed antenna based on multilayer printed circuit board containing two dielectric substrates four copper cladding layers. radiating elements, which consist slim rectangular patches with surrounding U-shaped parasitic patches, are located top layer. Every radiation elements grouped together as...

In this article, integrated millimeter-wave (mmW) broadband circularly polarized (CP) single-beam/multibeam antennas (MBAs) are reported. The comprised a Berryphase (BP) transmit-array (TA) containing three layers of slotted elliptical metallic resonator arrays and cluster substrate waveguide (SIW) -fed CP source radiators with an anisotropic impedance surface (AIS) superstrate. By utilizing mmW radiators, BP-based transmission phase compensation, tailoring the dispersive transfer function...

An integrated low-profile dual circularly polarized (dual CP) array antenna operating in the Q-band is proposed this paper, which realized by sequentially rotating subarrays comprised linearly (LP) substrate waveguide (SIW)-fed patches. The design methodology and working mechanism of LP SIW-fed patches presented first, implemented with a two-layer printed circuit board structure where SIW feeding network located bottom are on top substrate. Four then arranged according to requirements...

A low-cost millimeter-wave circularly polarized (CP) planar integrated magneto-electric dipole (ME-dipole) element with simple structure is proposed, which fed by a low-profile feeding capable of being directly Ka-band front-end circuits. Two rotationally symmetrical L-shaped patches are adopted to replace the two straight arms original linearly ME-dipole generate rotated electric field, thus radiating CP waves. Based on this element, array antennas containing 2 × and 4 radiators...

In this communication, a novel substrate integrated waveguide slot array with flat-shoulder-shaped radiation pattern is introduced for both 77 GHz automotive medium-range radar and long-range applications. The operational principle of the antenna introduced, while synthesis desired facilitated by mixed optimization method, including nonlinear fitting aggressive space mapping. Experiments are carried out measured peak gain proposed 21.7 dBi. demonstrated presents to be an excellent candidate...

A vertically folded slotted circular patch operating at the Ka -band is proposed in this communication. Fed by a low-profile microstrip feeding structure, resonates its quasi-TM21 mode and exhibits wide operational band of 23.5%, which more superior than many reported millimeter-wave antennas. full-corporate fed 2 × linearly polarized (LP) subarray based on designed without any additional substrate layer, further extended into 4 LP array circularly (CP) sequential rotation array. Both CP...

A millimeter-wave (mm-Wave) broadband linearly polarized (LP) substrate integrated magneto-electric dipole (ME-dipole) with a low-profile microstrip feeding structure covering the 22-33 GHz band is proposed in this article. It owns good performance, particularly terms of bandwidth and gain flatness. Importantly, LP MEdipole element can be easily expanded into full-corporate fed array without degradation requiring additional dielectric substrates. Moreover, its locating on hybrid (include...

Low-profile millimeter-wave (mm-Wave) arrays using wideband complementary element combining circularly polarized (CP) electric and magnetic sources are proposed in this article. A pair of centrosymmetric printed <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$ {\Gamma }$ </tex-math></inline-formula> -shaped strips serve as a CP source, modified narrow slot with two etched stubs can be treated source. The...

In the era of 5G and beyond, strategic utilization both sub-6 GHz millimeter-wave (mmWave) spectrums supports diverse communication services. Through smartphones, consumers can conveniently access a wide range 5G/6G-enabled Internet Things (IoT) scenarios anytime anywhere. this paper, mmWave aperture-shared antenna array are proposed for mobile terminals. For design, slot radiating is integrated into metallic frame smartphone. This design incorporates differential square-ring feeder utilizes...

This letter presents a novel substrate integrated asymmetric aperture radiating element with circularly polarized (CP) radiation. The proposed CP is constructed using only single layer laminate via standard printed circuit board (PCB) technology, thus, it simple in structure yet can achieve high gain and wide bandwidth. Circular polarization realized by SIW septum metalized vias which introduce 90° phase difference orthogonal electric fields simultaneously. A prototype of 1×4 array the...

This paper presents a waveguide bandpass filter that integrates bending and twisting functions, utilizing mixed TE101 TE102 mode resonators. Benefiting from the utilization of resonators, desired stopband suppression low insertion loss are achieved. To verify feasibility this approach, sixth-order Chebyshev centered at 20.4 GHz is designed, with bandwidth 1.6 (FBW = 7.84%) return more than 20 dB. The also achieves 120° in propagation direction 90° rotation polarization. prototype fabricated...

Array antennas for 77GHz automotive radar application are designed and measured. Linear series-fed patch array (SFPA) antenna is transmitters of middle range (MRR) all the receivers. A planar SFPA based on linear one substrate integrated waveguide (SIW) feeding network proposed transmitter long (LRR), which can decline radiation from itself. The fabricated, both performances with without radome these Good agreement between simulation measurement has been achieved. They be good candidates application.

This letter presents a millimeter-wave (mmW) continuous transverse stub (CTS) leaky-wave antenna (LWA) with pencil-beam broadside radiation, high scanning-rate, and low sidelobe levels (SLLs) characteristics. A parallel-plate waveguide (PPW) meander delay line is employed to control the phase constant of proposed LWA. By adjusting length electromagnetic TEM-mode PPW line, difference between adjacent radiating elements can be altered, achieving flexible scanning-rate. Match stubs close...

A structure reuse method based on mode composite transmission line (MCTL) is proposed to realize compact large frequency ratio multi-channel integrated filters in this brief. The MCTL composed of a fully shielded ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">i.e.,</i> substrate coaxial (SICL)) and semi-open microstrip line), where the outer conductor acts as signal achieve reuse. filter prototype integrates one sub-6G channel Ka-band...

This article presents a compact broadband 16-way two-dimensional (2-D) Butler matrix (BM)-based beamforming network (BFN) using multilayer substrate-integrated coaxial line (SICL). In order to achieve the goal of miniaturization and wide bandwidth, an SICL vertical-plane <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$4\times4$ </tex-math></inline-formula> BM is implemented for first time, then combined...

In this article, a wideband planar monopulse array antenna operating at Ka-band fed by the substrate integrated coaxial line (SICL) comparator network is proposed. The broadband SICL compactly deployed in center of feeding layer and with stacked patch antennas on multilayer printed circuit board (PCB), contributing to improved bandwidth, gain, total efficiency. Moreover, millimeter-wave (mmWave) front-end circuits can also be seamlessly same board. Prototypes <inline-formula...

In this letter, a novel high-gain filtering aperture antenna is proposed. It consists of five resonators, four which have radiation apertures in the end and are coupled to fifth one center by dislocation. Such mechanism gets rid conventional irises and, hence, saves volume some extent. The proposed characterized second-order Chebyshev bandpass response. Simultaneously, high gain achieved through apertures. order minimize its size weight, three-dimensional printing technology adopted for...

A linear array antenna comprising circular-shaped patches fed by slotted substrate integrated waveguide is proposed. The patch operates at the quasi-TM21 mode, which produces boresight radiation with an improved gain due to introduction of additional slot loadings in middle space patch. Comparisons among proposed 1 × 8 and two other traditional arrays used automotive radars are presented, highlighting superior performance array, i.e., higher wider dB bandwidth. Several key geometrical design...