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The paper describes concept of the patch antenna array for X-band FMCW (Frequency Modulated Continuous Wave) radar. This antenna is part of a system for detection of obstacles in the near vicinity of a helicopter. The intended function of this system is to detect and inform the flight crew of obstacles while maneuvering at low airspeed typically close to the ground. The antenna works at center frequency...
In this paper, an omni-directional cylindrical patch array antenna using liquid crystal polymer (LCP) technology is designed, the proposed antenna is composed of 8 linear sub-arrays fed by three-stage T-junction power divider network, and each sub-array contains 5 series-fed rectangular microstrip patches. Comparisons between measured and simulated results verify that the cylindrical patch array antenna...
A multilayer slot-coupled microstrip antenna array is proposed for anticollision radar at 24GHz with circular polarization (CP) characteristic. The array is composed of 24 elements with 24-way microstrip line power divider network. The antenna can achieve CP by rotate the radiation patch a certain angle without polarizer. The VSWR coefficient of the array's ports is less than 1.8, and the side lobe...
A single layer wideband SIW-fed differential patch array is proposed in this paper. A SIW-CPS-CMS (substrate integrated waveguide - coupled lines - coupled microstrip line) transition is designed and has a bandwidth of about 50%, covering the E-band and W-band. The differential phase deviation between the coupled microstrip lines is less than 7.5° within the operation band. A 1×4 array and a 4×4 array...
In this paper, a five element log periodic array has been designed using inset fed triangular microstrip patches. Gap is introduced in the feed line to the elements one at a time. Best frequency independent response is achieved when the second element is fed using gap coupling between the frequency ranges of 6.8 GHz to 15 GHz. The effect of applying the gaps in the feed line has been studied theoretically...
Linear patch arrays can be very useful where space is the matter of concern in one direction. Like planar array, linear arrays are also capable of providing high gain and directivity with beam scanning. The paper focuses on air borne applications. Proposed linear array are suitable due to its conformability and meeting the constraint of space for such applications. The design presented in this paper...
In this paper, we propose a wideband microstrip line slot array antenna. A microstrip line slot array antenna is constituted by a slot fed in series using the microstrip line. This antenna has features that the feeding loss is small and it is easy to configure the array antenna of the multi-element. However, the bandwidth is narrow compared with a conventional parallel fed array antenna. To overcome...
In this research, a co-planar antenna with a small dimension is presented for vessel navigation radar. The radar, will be produced in a compact size so that it can be used at any type of vessels. The small antenna was fabricated on Duroid series 6006 with a permittivity value εr of 6.15. This enables a production of smaller antenna dimension, in comparison to the dimension of our antenna from the...
In this paper author presents a technique to design Transmission line Model (TLM) equivalent circuit of 2 element micro strip patch antenna array. This 2x1 micro strip patch antenna array resonates at 2.44 GHz. The dimension of each patch in the array antenna is 0.3? x 0.23?. Micro strip inset line feeding technique is used to feed the antenna structure. The width of the feed is designed accordingly...
In this paper a compact rectangular and circular micro strip patch antenna array is designed using series feed network for traffic speed detector application. Proposed antenna array has been designed using method of moment based IE3D software. Proposed antenna array operates at the resonant frequency 10.40GHz. Roger/RT duroid with dielectric constant 2.2 and height 1.588 mm has been used as a substrate...
In this Paper, the feasibility of an unequal amplitude equal phase power splitter using a microstrip technology in the UHF band is proposed. Unequal splitter with 3-options is designed in the present work, these are conventional microstrip design, Power splitter with input transformer & arbitrary design impedance (A) is introduced to control high impedance values and Power splitter with general...
In this paper, the feasibility of an 8-way unequal amplitude equal phase power splitter using a conventional microstrip technology in the 430MHz UHF band is proposed for Tropospheric wind profiling radar. Feeder network with unequal amplitude is designed based on the side lobe level requirement −17db down from the main beam. The theoretical design and simulated results are presented to verify our...
It has been discovered that the asymmetrical elements' length of upper and below truncated edges are the new parameter to fulfill the requirement of circular polarization (CP). The proposed antenna has a simple structure, consists of 2 × 2 patch antenna as its radiating elements and a single coaxial connector at the ground layer is used as a feed. The dimension of each patch antenna is 25.65 mm ×...
This article reports design and fabrication of a 1 × 2 planner rectangular dualband patch antenna array using circular CSRR in the ground plane. The proposed antenna operates simultaneously at 2.44 and 5.25 GHz band. It has measured gain of 7.21 and 8.12 dBi, 10 dB bandwidth of 120 MHz and return loss of −14dB at desired bands. The proposed antenna is specially designed to cater the needs of a portable...
In this paper, a novel design of 4×1 broadband circularly polarized active antenna array is proposed for telemetry signal reception. The antenna array is designed using electromagnetically coupled microstrip radiating elements and consists of bias tee and low noise amplifier. The 4×1 antenna array has broad VSWR < 2 bandwidth of 9.5% and axial ratio < 6 dB bandwidth of 7.5% at 2.2 GHz. The 4×1...
In this paper design and development of an S Band linearly polarized microstrip patch antenna for high temperature applications is presented with simulated and measured results. The antenna requires dielectric cover over radiating portion to provide the protection from heat, physical damage and environment. This antenna configuration is mostly useful in applications like missiles, aircrafts, spacecrafts...
A single feed Broadband Circularly polarized Microstrip patch antenna array operating at C-band frequency has been analyzed and designed. The antenna is mainly intended to be used for continuous command transmission. In order to avoid energy losses due to mismatch of linear polarized antennas, we choose circularly polarized antennas. The proposed antenna configuration is designed and optimized by...
This paper presents new design of artificial magnetic conductor structure along with feed line. 4 × 1 microstrip patch antenna array using AMC improves performance of antenna. AMC structures are used in design low profile antennas. High gain, minimum size and larger band width required for communication system. This leads to design patch antenna array. So this paper presents four element microstrip...
To help with long range coverage, minimal interference, and reduced energy requirements, recently there have been growing interest in incorporating directional antenna arrays in wireless communication networks. In this paper, we describe the challenges and opportunities in developing directional wireless communication networks and present innovative options that could facilitate this development,...
A 2×4 substrate integrated waveguide (SIW) aperture coupled patch antenna array has been designed and fabricated. This antenna operates in the unlicensed band of 24 GHz for wireless backhaul or radar applications. The microstrip patches are aperture-coupled with the feeding network composed of two branches with 4-slots series fed array.
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