This communication demonstrates a method to design filtering antennas by using the filtering-radiating patch (FRP). The socalled FRP is structure of rectangular etched with slots. It inherits radiation performance conventional antennas, and more importantly, introduces feature null at either upper or lower band edge efficiency curve. frequencies nulls are easy control. Based on FRP, novel antenna proposed. Two realized both edges curve, leading sharp skirt good selectivity in boresight gain...

This paper presents a novel circularly polarized (CP) planar aperture antenna for cost-sensitive millimeter-wave, particularly fifth generation (5G), applications. The proposed antenna, which is differential one, has high gain and wide bandwidth can be built on single-layer laminate using standard printed-circuit board (PCB) technology. makes the both low cost easy to integrate with common circuits. consists of an opening cavity formed by metalized vias, encloses set loop-like strips that...

A new differentially fed frequency reconfigurable antenna adopting proximity-coupling feeding for WLAN and sub-6-GHz 5G applications is proposed in this paper. It consists of two substrates that are separated by a 2.5-mm-thick air gap. By configuring the four p-i-n diode switches arranged on substrates, excitation radiating patch length feed-lines can be controlled, then, different operating bands obtained. The experiments indicate designed switched between states at 2.45- 3.50-GHz band,...

A wideband highly isolated multiple-input-multiple-output patch antenna with an artificial magnetic conductor (AMC) ground plane is proposed in this letter. The antenna, which rotationally symmetrical, constructed by V-shaped patches coupled a bowtie dipole. dipole and the parasitic produce two resonant modes that are together. Therefore, wide impedance bandwidth obtained. Thanks to orthogonal feeding symmetrical geometry, exhibits high port isolation as well radiation patterns compact size...

A new differential frequency-reconfigurable antenna based on dipoles is presented in this letter. The basic structure of the proposed consists two pairs vertical arms forming dipoles, feeding structure, mode switching and p-i-n diodes. By "on" "off" diodes, can resonate at states, thus work centered 3.5 5.5 GHz, respectively. Though states correspond to different resonant modes, effective radiation parts are same will not contribute far field for both states. This results similar patterns...

This communication presents new designs of dual-circularly polarized (CP) planar aperture antenna and array for 60 GHz applications. First, a four-port with its feeding network is developed that exhibits wide impedance bandwidth, dual-CP radiation as well high gain. Then, based on the proposed antenna, scheme building proposed. With this combines power splitting series method, four sequentially fed elements are successfully combined to form CP array. The experimental results show -10 dB...

This paper presents a novel dual polarized planar aperture antenna using the low-temperature cofired ceramics technology to realize antenna-in-package for 60-GHz CMOS differential transceiver chip. Planar ensures high gain and wide bandwidth. Differential feeding is adopted be compatible with Dual polarization makes function as pair of single antennas but occupies much less area. The ±45° polarized, each acts either transmitting (TX) or receiving (RX) antenna. improves signal-to-noise ratio...

In this letter, a new omnidirectional circularly polarized (CP) antenna is proposed. By adopting coaxial probe, in which metal sleeve acts as monopole, and printed spoke-like strips fabricated on two substrates, act loop, exhibits an radiation the azimuthal plane. Theory, design, simulation, experiment of are presented. Measurement results show that proposed can achieve -10-dB impedance bandwidth 13.8% (ranges from 1.55 to 1.78 GHz) 3-dB axial-ratio (AR) 17.5% 1.46 1.74 At frequency 1.575...

This paper presents a novel planar aperture antenna with differential feeding. Compared conventional high-gain antennas, such as horn and reflector it maintains high gain wide bandwidth, but has much lower profile only one quarter-wavelength height. Since the height ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${\lambda_{\bf{g}}}/4$</tex-math></inline-formula> ) at millimeter-wave (mmWave) band is low...

A dual-layer patch antenna using multiple parasitic patches for the bandwidth enhancement is presented. Two additional resonances can be obtained with help of antenna. Consequently, a wide impedance 17% (|S11| <; -10 dB) achieved. Then, without increase array footprint, combinations two decoupling techniques (i.e., metalized via walls and short-circuited stepped-impedance structures as neutralized networks) are adopted mutual coupling reduction when element extended to 2 x 1, 2, even 4...

This paper presents a new dual-band dual circularly polarized (CP) high gain patch antenna array for vehicle satellite communications. The consists of 16 linearly elements backed with frequency-selective-surface (FSS)-integrated polarization rotation ground. ground is located underneath the array, which not only acts as reflector to increase boresight but also enables array's CP radiation. electromagnetic (EM) waves reflected by retard either 90° or 270° respect EM directly radiated upper...

Fresnel zone plate (FZP) lens antenna, consisting of a set alternative transparent and opaque concentric rings arranged on curvilinear or flat surfaces, have been widely used in various fields for sensing communications. Nevertheless, the state-of-art FZP antennas are limited to single band due frequency-dependent feature, which hinders their use multi-band applications. In this work, shared aperture dual-band metalens antenna is proposed by merging two single-band operating at distinct...

This article presents an aperture-shared dual-band large frequency-ratio high gain antenna for sub-6 GHz and millimeter-wave (mm-wave) bands applications. Initially, the partially reflective surface (PRS) of Fabry–Pérot cavity (FPC) operating at band is realized by using single-layered periodic grid patches while opaque region mm-wave bandwaveband Fresnel zone plate (FZP) lens implemented double-screen dipoles. Then, PRS FZP are hybridized together upgraded into a kind composite metasurface,...

This letter presents a dual-band antenna with large frequency ratio of 11.7 (2.4 GHz/28 GHz) by integrating an mm-wave Fabry–Perot cavity (FPC) into sub-6 GHz patch antenna. The periodic slots functions as both the 2.4 radiator and partially reflective surface (PRS) 28 FPC By properly tuning length slot, PRS's reflection can be easily adjusted. As slot's width operating at are much smaller than wavelength GHz, slot have little impact on radiation patch. Furthermore, because resonance, peak...

To perform wide-angle scanning while maintaining a planar low profile, we propose new kind of millimeter-wave (mm-Wave) phased array antenna using inclined beam elements to imitate curved surface conformal (CSC) array, called pseudo-CSC (PCSC) antenna. We present the concept our PCSC and then design an elongated aperture (EPAA) element, achieving stable high broadside gain wide on plane within bandwidth. Then, by introducing asymmetries EPAA inclination element can be adjusted. Accordingly,...

This letter presents a new wideband high-gain circularly polarized (CP) substrate integrated cavity excited antenna array for the 60 GHz applications. First, 2 × 2-element CP is proposed with an aperture-coupled two-arm spiral as its radiating element, which can exhibit good radiation performance. Instead of conventional lossy and complicated feed network, simple but efficient excitation structure based on higher-order-mode (TE340) resonance used to array. The feeds all elements in same...

This communication presents a new kind of substrate-integrated waveguide (SIW) slot antenna array with 1-D and 2-D monopulse radiation patterns. First, SIW magic-tee is developed, which exhibits wide phase/amplitude balance bandwidth. Then, the extended to comparator used feed pattern. Based on proposed comparator, arrays 4 × elements are designed measured, respectively. The experimental results show that exhibit good performance. More importantly, compared their former counterparts,...

This paper proposes a novel substrate integrated waveguide (SIW) higher order mode cavity fed <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$2 \times 2$</tex-math></inline-formula> -element slot array. The feeds all of the elements simultaneously, and resonant is excited only by aperture, which helps simplify feeding network. To enhance bandwidth, array designed as an asymmetric structure with different...

This letter presents a dual-band, dual-polarized antenna array arrangement for low grating lobe base-station applications. The presented uses two different lower band elements to achieve 2.5-time element spacing scheme, in which is 2.5 times of upper spacing. With this arrangement, both the and can be reduced, leading better performance. To verify idea, an operating at bands, namely, 690-960 1690-2690 MHz, presented. For MHz array, radiation are designed, each them has pairs bent dipoles...

This communication proposes a new all-dielectric broadband dual-band reflectarray with large frequency ratio using low-cost 3-D printing. In contrast to conventional reflectarrays metallic resonant cells or dielectric slabs as phasing elements full metal ground, the proposed design uses air element and stepped mirror structure ground. this way, ground is removed, which makes an one. Taking advantage of that only exhibits bandgap in predesigned band while allowing electromagnetic (EM) waves...

This communication proposes a dual-band antenna hybridizing folded reflectarray (FRA) and transmitarray (FTA). First, polarization-rotation is designed based on new Fabry–Perot (FP)-liked phasing element. Unlike its counterparts, this FP-liked element twists the polarization of electromagnetic (EM) waves provides sufficient phase tuning range only in operating band FTA. In meantime, FRA, acts as polarizing grid, which reflects one while allowing orthogonally polarized to pass without...

Controlling the wavefront and manipulating polarization of electromagnetic wave using an ultrathin flat device are highly desirable in many emerging fields. To shape between two decoupled orthogonal circular states, that is, right-hand (RCP) left-hand (LCP), most state-of-the-art metasurfaces (MSs) combine propagation phase Pancharatnam-Berry into meta-atoms. This article proposes a different strategy to fully decouple LCP RCP control their wavefronts independently. By taking advantage...