你这个DK7ZB 14单元八木天线振子参考数据可能把你骗了 增益不止那么高
我这有一份我用八木天线计算器算的天线 用仿真软件跑了优化 同为14单元 增益比你多上约2dBi
仿真图及振子数据见附件
还不需要匹配电路！
说句难听点的 大家别太信DK7ZB那个天线 那玩意的数据都是网传的 可能不是最好的数据
天线计算器
原始（未优化）数据如下：
VK5DJ's YAGI CALCULATOR
Yagi design frequency =144.15 MHz
Wavelength =2080 mm
Parasitic elements fastened to a non-metallic or separated from boom
Folded dipole mounted same as directors and reflector
Director/reflector diam =10 mm
Radiator diam =12 mm
REFLECTOR
1014.1 mm long at boom position = 30 mm (IT = 507.0 mm)
RADIATOR
Single dipole 977.3 mm tip to tip, spaced 415.9 mm from reflector at boom posn 445.9 mm (IT = 488.5 mm)
Folded dipole 996.9 mm tip to tip, spaced 415.9 mm from reflector at boom posn 445.9 mm (IT = 498.5 mm)
DIRECTORS
Dir Length Spaced Boom position IT Gain Gain
(no.) (mm) (mm) (mm) (mm) (dBd) (dBi)
1 913.5 156.0 601.9 457.0 4.8 6.9
2 903.8 374.4 976.3 452.0 6.5 8.6
3 894.8 447.1 1423.4 447.5 7.8 9.9
4 886.4 519.9 1943.3 443.0 8.9 11.0
5 878.6 582.3 2525.7 439.5 9.8 11.9
6 871.4 623.9 3149.6 435.5 10.5 12.7
7 864.8 655.1 3804.7 432.5 11.2 13.3
8 858.6 686.3 4491.0 429.5 11.7 13.9
9 852.9 717.5 5208.5 426.5 12.2 14.4
10 847.6 748.7 5957.2 424.0 12.7 14.9
11 842.6 779.9 6737.1 421.5 13.1 15.3
12 838.1 800.7 7537.8 419.0 13.5 15.7
COMMENTS
The abbreviation "IT" means "Insert To", it is the construction distance from the element tip to the edge of the boom for through boom mounting
Spacings measured centre to centre from previous element
Tolerance for element lengths is +/- 6 mm
Boom position is the mounting point for each element as measured from the rear of the boom and includes the 30 mm overhang.The total boom length is 7553 mm including two ends of 30 mm and 15 mm
The ACTIVE boom length is 7508 mm is the length used in gain calculations (see manual)
The beam's estimated 3dB beamwidth is 34 deg
A half wave 4:1 balun uses 0.66 velocity factor RG-213 (PE) and is 686 mm long plus leads
FOLDED DIPOLE CONSTRUCTION
Measurements are taken from the inside of bends
Folded dipole length measured tip to tip = 997mm
Total rod length =2036mm
Centre of rod=1018mm
Distance BC=CD=473mm
Distance HI=GF=466mm
Distance HA=GE=505mm
Distance HB=GD=544mm
Distance HC=GC=1018mm
Gap at HG=15mm
Bend diameter BI=DF=50mm
If the folded dipole is considered as a flat plane (see ARRL Antenna Handbook) then its resonant frequency is 143.0MHz and K is 0.951
MATERIALS GUIDE for purchase. Allow extra, do NOT use these figures for cutting
NO allowance for saw cuts or purchased lengths resulting in waste
1) Length used by directors and reflector 11467.1mm of round 10mm rod
2) Length used by single dipole 977.3mm or folded dipole 2035.8 mm of round 12mm rod
3) Length used for boom 7552.8 mm allowing for overhangs of 30 mm and 15 mm of 0 mm diameter round stock
仿真软件mmana-gal文件：
144.1Mhz Yagi for EME
*
144.15
***Wires***
14
0.0, -0.4962, 0.0, 0.0, 0.4962, 0.0, 0.006, -1
-0.4119, -0.503, 0.0, -0.4119, 0.503, 0.0, 0.005, -1
0.19, -0.4588, 0.0, 0.19, 0.4588, 0.0, 0.005, -1
0.5433, -0.4504, 0.0, 0.5433, 0.4504, 0.0, 0.005, -1
1.0025, -0.4489, 0.0, 1.0025, 0.4489, 0.0, 0.005, -1
1.5374, -0.4447, 0.0, 1.5374, 0.4447, 0.0, 0.005, -1
2.1147, -0.4408, 0.0, 2.1147, 0.4408, 0.0, 0.005, -1
2.7386, -0.4372, 0.0, 2.7386, 0.4372, 0.0, 0.005, -1
3.3938, -0.4324, 0.0, 3.3938, 0.4324, 0.0, 0.005, -1
4.0801, -0.4293, 0.0, 4.0801, 0.4293, 0.0, 0.005, -1
4.7976, -0.4264, 0.0, 4.7976, 0.4264, 0.0, 0.005, -1
5.5463, -0.4238, 0.0, 5.5463, 0.4238, 0.0, 0.005, -1
6.3262, -0.4213, 0.0, 6.3262, 0.4213, 0.0, 0.005, -1
7.1269, -0.419, 0.0, 7.1269, 0.419, 0.0, 0.005, -1
***Source***
1, 0
w1c, 0.0, 1.0
***Load***
0, 0
***Segmentation***
800, 80, 2.0, 2
***G/H/M/R/AzEl/X***
2, 0.5, 4, 50.0, 120, 60, 0.0
###Comment###
Mod by Nuo, BH6BMJ 2026/2/13 9:28:37
[ 此帖被bh6bmj在2026-02-13 17:02重新编辑 ]
