欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
传统的自相移馈电四臂螺旋天线（QHA）由于最小回波损耗频点和最小轴比频点不在一个频率上，因此，难以在较宽的频带内同时满足良好的阻抗匹配和圆极化特性．虽然采用功分相移网络馈电可以解决上述问题，但是馈电网络尺寸普遍较大，难以应用于手持机上．本文提出了一种底部带有紧凑的功分相移馈电网络的四臂螺旋天线，可以在宽频带内实现四个输出端功率平衡输出，相位两两相差90度．所提出的馈电网络使得四臂螺旋天线既可以实现宽带圆极化辐射，又具有小尺寸，非常适合GPS、北斗移动手持设备的应用需求．
英文摘要：
Conventional self-phasing method is difficult to achieve excellent impedance matching and circularly polarized （CP）radiation simultaneously over a wide band in q~drifilar helix antenna（ QHA）designs. This is because the lowest points of re- turn loss and axial ratio cannot match. Although QHA with additional feeding network can solve the problem above, the size is too large to be used in handset applications. In this paper, we proposed a QHA attached a compact feeding network on its bottom end to achieve balanced power division and q~drature phasing in a wide bandwidth. QHA with the proposed feeding network could achieve broadband CP radiation.Moreover,the configuration is compact and very suitable for GPS/CNSS portable mobile handset applica- tions.
同期刊论文项目
同项目期刊论文
Assembled Dual-Band Broadband Quadrifilar Helix Antennas With Compact Power Divider Networks for CNS
High-selectivity wideband bandpass filter using quarter-wave coupled lines and quarter-wave series t
Dual-band filter using asymmetrical stub-loaded resonator with independently controllable frequencie
A novel Gysel power divider design with uniform impedance transmission lines for arbitrary power-div
Study on the stability and numerical error of thefour-stages split-step FDTD method including lumped
An Improved Wideband Balanced Filter Using InternalCross-Coupling and 3/4λ Stepped-Impedance Resonat
Study on the Stability and Numerical Error of the Four-Stages Split-Step FDTD Method Including lumpe
A CPW-FED planar dual band-notched ultra-wideband antenna by etching an S-shaped SIR slot on the fee
Compact Wide-Beam Circularly-Polarized Microstrip Antenna With a Parasitic Ring for CNSS Application
An In-Phase Output Ka-Band Traveling-Wave Power Divider/Combiner Using Double Ridge-Waveguide Couple
A Compact Ka-Band Broadband Waveguide-Based Traveling-Wave Spatial Power Combiner with Low Loss Symm
Assembled Dual-band Broadband Quadrifilar HelixAntennas with Compact Power Divider Networks for CNSS
Dual-band reconfigurable bandpass filter with independently controlled passbands and constant absolu
Novel Quad-band filter with high frequency ratio andcontrollable bandwidths using SLHSIRS and SLQSIR
期刊信息
位置：