[天线]3 A simple accurate the radiation conductance of a rectangular microstrip antenna

A simple accurate the radiation conductance of a rectangular microstrip antenna CSW+UaE  
A SIMPLE ACCURATE FORMULA FOR THE RADIATION Pe\Obd8d  
CONDUCTANCE OF A RECTANGULAR MICROSTRIP ANTENNA \k"CtzoX  
8. Pues and A. Van d e C a p e l l e t54?<-  
D e p t . E l e k t r o t e c h n i e k - M.I.L., +%klS `_  
B-3030 Eieverlee, Belgium h*1T3U$  
I n t r o d u c t i o n \ %MsG  
The r a d i a t i o n c o n d u c t a n c e o f a m i c r o s t r i p a n t e n n a c a n FZ]+(Q"]:  
b e a c c u r a t e l y c a l c u l a t e d u s i n g t h e a p e r t u r e m o d e l d e s - biw . ~  
c r i b e d by Hammer e t a l . [l] . T h i s m e t h o d h o w e v e r i n - l.g.O>1   
v o l v e s t h e n u m e r i c a l e v a l u a t i o n of a d o u b l e i n t e g r a l . ~9#x=nU:+V  
Hence t h e r e r e m a i n s a n e e d o f a s i m p l e a c c u r a t e forw )'RaMo` 4  
o u l d b e v a l u a b l e f o r u s e in m o s t m o d e l s t h a t were 3 4%B0  
m u l a f o r t h e r a d i a t i o n c o n d u c t a n c e . S u c h a formula (.Ak*  
m i s s i o n l i n e m o d e l [2] a n d t h e moda! e x p a n s i o n c a v i t y 0m> 8  
d e v e l o p e d f o r t h e m i c r o s t r i p a n t e n n a s u c h a s t h e t r a n s - ~G=E Q]a
  
m u l a d e r i v e d b y E I a r r i n g t o n [ 4 ] f o r a p a r a l l e l - p l a t e g u i d e W4k$m2  
m o d e l w i t h i m p e d a n c e b o u n d a r i e s [ 3 ] . U n t i l now a forr 6=,zkU*i^  
a d i a t i n g i n t o h a l f - s p a c e was f r e q u e n t l y u s e d i n s u c h t18j2P>`  
cases [2] - [3] . Eiowever, t h i s f o r m u l a is o n l y v a l i d for ,3-^EfccW  
l o n g s l o t s ( i . e . f o r w i d e p a t c h e s ) a n d d o e s n o t t a k e ;&}z L.!jo  
i n t o a c c o u n t ( o f i t s e l f ) r a d i a t i o n c o u p l i n g b e t w e e n .<fdX()e,  
t h e d i f f e r e n t s l o t s . C o n s e q u e n t l y t h e r a d i a t i o n c o n - KDGrX[L:6  
d u c t a n c e p r e d i c t e d b y t h e d i f f e r e n t m o d e l s c a n n o t b e yVGf[~X  
v e r y a c c u r a t e i f t h i s f o r m u l a is u s e d ( a c t u a l l y errors (4ZO[Ae  
o f u p t o 1 0 0 % a n d m o r e c a n o c c u r f o r n a r r o w p a t c h a n - O(=9&PRi  
t e n n a s s u c h as s q u a r e r e s o n a t o r s ) . "zXrfn
 
I n t h i s p a p e r a s i m p l e b u t a c c u r a t e f o r m u l a f o r t h e r a - 2T(+VeM
Q=  
d i a t i o n c o n d u c t a n c e [ e q n . 3 ) is d e r i v e d t h a t c l o s e l y |=,jom  
a p p r o x i m a t e s t h e r e s u l t s of t h e a p e r t u r e m o d e l [ l ] . The &&LB0vH
!J  
f o r m u l a a p p l i e s f o r t h e f u n d a m e n t a l r a d i a t i n g mode of p"jze3mF  
t h e r e c t a n g u l a r m i c r o s t r i p r e s o n a t o r a n t e n n a a n d m a k e s )Qe]!$tqfD  
u s e o f t w o n e w l y d e r i v e d r e s u l t s : a n a s y m p t o t i c e x p a n - Oi^cs=}  
s i o n f o r t h e r a d i a t i o n c o n d u c t a n c e o f a n a r r o w s l o t mPQT%%MF  
r a d i a t o r ( e q n . 1) .. wWf_d jd  
{5c?_U  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册