( ( The ( far ( field pattern ) ) ) ( ( ( is thus ) ( seen ( to ( consist ( of ( ( ( a ( ( transverse electromagnetic ) ( ( -LRB- ( TEM -RRB- ) ) wave ) ) ) , ) ( with ( ( ( ( ( ( electric ( and ( magnetic fields ) ) ) ( at ( right angles ) ) ) ( ( ( to ( each other ) ) and ) ( at ( right angles ) ) ) ) ( to ( the direction ) ) ) ( of propagation ) ) ( -LRB- ( ( ( the direction ) ( of ( ( r , ) ( as ( we ( assumed ( the ( source ( to ( be ( at ( the origin ) ) ) ) ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ far) (NN field) (NN pattern)) (VP (VBZ is) (ADVP (RB thus)) (VP (VBN seen) (S (VP (TO to) (VP (VB consist) (PP (IN of) (NP (NP (DT a) (ADJP (JJ transverse) (JJ electromagnetic)) (PRN (-LRB- -LRB-) (NP (NNP TEM)) (-RRB- -RRB-)) (NN wave)) (, ,) (PP (IN with) (NP (NP (JJ electric) (CC and) (JJ magnetic) (NNS fields)) (PP (IN at) (NP (JJ right) (NNS angles))) (PP (PP (TO to) (NP (DT each) (JJ other))) (CC and) (PP (IN at) (NP (JJ right) (NNS angles)))) (PP (TO to) (NP (DT the) (NN direction))) (PP (IN of) (NP (NN propagation))) (PRN (-LRB- -LRB-) (NP (NP (DT the) (NN direction)) (PP (IN of) (NP (NP (SYM r)) (, ,) (SBAR (IN as) (S (NP (PRP we)) (VP (VBD assumed) (NP (DT the) (NN source) (S (VP (TO to) (VP (VB be) (PP (IN at) (NP (DT the) (NN origin))))))))))))) (-RRB- -RRB-))))))))))) (. .)))
The far field pattern is thus seen to consist of a transverse electromagnetic (TEM) wave, with electric and magnetic fields at right angles to each other and at right angles to the direction of propagation (the direction of r, as we assumed the source to be at the origin).
(ROOT (S (SBAR (IN Because) (S (NP (NP (DT the) (NNS fields)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (DT an) (JJ electromagnetic) (NN wave)))))) (VP (VBP are) (PP (IN at) (NP (NP (JJ right) (NNS angles)) (PP (PP (TO to) (NP (DT each) (JJ other))) (CC and) (PP (TO to) (NP (DT the) (NN direction)))))) (SBAR (IN that) (S (NP (DT the) (NN wave)) (VP (VBZ travels))))))) (, ,) (NP (DT an) (JJ electromagnetic) (NN wave)) (VP (VBZ is) (VP (VBN considered) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN transverse) (NN wave))))) (. .)))